Dr. Azrin studies various complications that can arise from heart procedures, particularly how they affect elderly patients and those with complex medical histories. His work addresses conditions such as non-ST elevation acute coronary syndrome, heart valve complications post-surgery, and persistent high blood pressure that doesn't respond well to typical treatments. He explores treatment methods like renal denervation for resistant hypertension and different therapies for atrial fibrillation, weighing the benefits against potential risks such as bleeding and heart attacks.
Key findings
In elderly patients with non-ST elevation acute coronary syndrome, invasive treatment reduced heart attacks by 41% and the need for unplanned procedures by 70%, despite a doubled risk of major bleeding.
Renal denervation led to a significant average reduction in blood pressure readings of 3.45 mmHg systolic and 1.87 mmHg diastolic in patients with resistant hypertension.
Patent foramen ovale closure significantly reduced the risk of ischemic strokes by 66% compared to medical therapy, with a 45% reduction in combined stroke risk, though there was an increased risk of atrial fibrillation.
Frequently asked questions
Does Dr. Azrin study heart health in older adults?
Yes, he focuses on heart conditions in elderly patients, particularly the risks and benefits of invasive treatments.
What complications does Dr. Azrin research after heart surgeries?
He studies complications like coronary artery compression after aortic valve surgery and how to prevent serious outcomes from these issues.
Is Dr. Azrin's work relevant to patients with high blood pressure?
Absolutely, his research on renal denervation provides insights on managing resistant hypertension effectively.
What advancements has Dr. Azrin contributed to heart surgery?
Dr. Azrin has explored new techniques for treating complications during heart procedures, improving patient safety and outcomes.
Does Dr. Azrin study alternatives to traditional blood thinners?
Yes, he compares new therapies with traditional blood thinners to assess safety and effectiveness for patients undergoing heart procedures.
Publications in plain English
Renal artery stent thrombosis as a complication of percutaneous renal artery revascularization and stent placement.
2025
Proceedings (Baylor University. Medical Center)
Passey S, Pandey S, Mehta A, Meng J, Azrin M
Plain English This study looked at a 46-year-old man who had narrowing of both renal arteries and developed a serious health crisis after getting a stent placed in one of them. The doctors found that the stent was blocked with a blood clot, which can happen after the procedure, and they had to perform several treatments to fix it. This matters because it shows that patients need to be chosen carefully for this procedure and closely monitored afterward to avoid dangerous complications.
Who this helps: This helps doctors and patients considering kidney artery stenting.
Post-surgical External Coronary Artery Compression: A Rare Cause of ST Elevation Myocardial Infarction.
2023
Cureus
Alam MM, Azrin M, Adeel Y
Plain English This study looked at a rare complication that can happen after aortic valve surgery, where a drain tube compresses a coronary artery, leading to a heart attack. In one case, a 75-year-old woman experienced severe chest pain just one day after her surgery; tests showed her heart was not receiving enough blood because the drain tube was pressing on a key artery. Once the tube was adjusted, her heart problems cleared up, highlighting that medical staff need to be aware of this type of complication after heart surgeries.
Who this helps: This information benefits doctors and heart surgery patients by emphasizing the need for careful monitoring after procedures.
Routine Invasive Strategy in Elderly Patients with Non-ST Elevation Acute Coronary Syndrome: An Updated Systematic Review and Meta-analysis of Randomized Trials.
2022
Current problems in cardiology
Abusnina W, Radaideh Q, Al-Abdouh A, Ismayl M, Algheriani H +7 more
Plain English This study looked at whether invasive treatment, like coronary angiography, is better than just medical therapy for elderly patients (over 75) suffering from a type of heart condition called non-ST elevation acute coronary syndrome (NSTE-ACS). The researchers found that while the invasive approach didn't lower overall death rates or stroke risk, it did significantly reduce heart attacks (by 41%) and the need for unplanned heart procedures (by 70%). However, it also increased the risk of major bleeding by more than double.
Who this helps: This information helps doctors make better treatment decisions for elderly patients with heart issues.
The absence of evidence is not the evidence of absence: A case report on the challenges in diagnosing ostial left main stenosis.
2021
Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions
Shaik A, Mosleh W, Dahal K, Pickett C, Azrin M
Plain English This research looked at the difficulties in accurately diagnosing a serious heart condition called left main coronary artery stenosis, which can lead to higher risks of death and complications. The study details the case of a 56-year-old man whose condition was not identified after several heart tests. It emphasizes that relying only on traditional angiography might miss important issues, showing the need for additional tests to get a correct diagnosis.
Who this helps: Patients with heart conditions and their doctors benefit from improved diagnostic methods.
Renal Denervation in the Management of Hypertension: A Meta-Analysis of Sham-Controlled Trials.
2020
Cardiovascular revascularization medicine : including molecular interventions
Dahal K, Khan M, Siddiqui N, Mina G, Katikaneni P +3 more
Plain English This study looked at a treatment called renal denervation (RD) for people with high blood pressure that doesn't respond to regular medications, known as resistant hypertension. The researchers found that RD significantly lowered 24-hour blood pressure readings by an average of about 3.45 mmHg for systolic (the top number) and 1.87 mmHg for diastolic (the bottom number), compared to a placebo treatment. This matters because lowering blood pressure can help reduce the risk of heart disease and stroke in these patients.
Who this helps: This helps patients with resistant hypertension.
A Successful CardioMEMS™ Implantation via Brachial Vein Access: A Case Report.
2020
Cardiovascular revascularization medicine : including molecular interventions
Dahal K, Austin B, Azrin M, Lee J
Plain English This study focused on a new method for implanting the CardioMEMS™ device, which measures pressure in the lungs to help manage heart failure. The researchers successfully used the brachial vein, a less common approach, to implant the device in a patient who could not use traditional methods. This is important because it shows that there are alternative options for patients who might otherwise miss out on this life-saving technology.
Who this helps: This helps patients who have difficulty using standard access points for heart care devices.
NOAC-Based Sual Therapy Versus Warfarin-Based Triple Therapy After Percutaneous Coronary Intervention or Acute Coronary Syndrome in Patients With Atrial Fibrillation: A Systematic Review and Meta-Analysis.
2020
Cardiovascular revascularization medicine : including molecular interventions
Dahal K, Mosleh W, Almnajam M, Khaddr M, Adeel MY +4 more
Plain English This study examined the safety and effectiveness of a new treatment approach for patients with atrial fibrillation who had heart procedures or issues. Researchers compared two methods: a dual therapy that uses non-vitamin K anticoagulants (NOACs) and another one using traditional warfarin-based triple therapy. They found that the dual therapy led to fewer bleeding complications (56% lower risk) without significantly increasing the risk of serious heart or brain events, although there was a slight trend towards more stent clots.
Who this helps: Patients with atrial fibrillation undergoing heart procedures benefit from this research.
A Case of Isolated External Iliac Vein Compression Syndrome and the Role of Advanced Imaging.
2020
Vascular and endovascular surgery
Mukarram O, Dahal K, Azrin M, Lee J
Plain English This study looked at a rare condition where a vein in the leg is compressed, causing problems like pain, swelling, and skin changes. The researchers presented a case of an 86-year-old man who had severe swelling for years, and despite taking medication, he didn't get better. By using advanced imaging techniques, they found that the compression was caused by a nearby artery, which helped them treat the problem effectively.
Who this helps: This benefits patients with chronic leg swelling and their healthcare providers.
Late-Onset Nonthrombotic Left Common Iliac Vein Compression Secondary to Degenerative Lumbar Disc: A Case Report of May-Thurner Variant.
2019
Vascular and endovascular surgery
Khalid S, Youn YJ, Azrin M, Lee J
Plain English This study looked at a 66-year-old woman who experienced swelling in her left leg due to a condition called May-Thurner syndrome, which happens when a blood vessel is compressed. Unlike typical cases seen in younger women, her issue arose from a bulging disc in her spine rather than a blood clot, as confirmed by detailed imaging tests. This matters because it shows that older patients can also suffer from this syndrome and need careful diagnosis and treatment to prevent further complications.
Who this helps: This helps doctors and healthcare providers in diagnosing and treating older women with leg swelling.
Stenosis Caused by Suture-Mediated Vascular Closure Device in an Angiographic Normal Common Femoral Artery: Its Mechanism and Management.
2019
Vascular and endovascular surgery
Youn YJ, Khalid S, Azrin M, Lee J
Plain English This research studied a specific problem where a device used to close up blood vessels after heart procedures caused narrowing of the femoral artery in a patient. The team found that using techniques like a special tool to remove blockages and a balloon to widen the artery effectively helped restore normal blood flow. Understanding this issue is important because it helps guide doctors in managing rare complications related to these widely used closure devices.
Who this helps: This helps patients who may experience complications from vascular closure devices after heart procedures.
Novel approach to coronary artery perforation repair.
2019
Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions
Ingrassia J, Youn YJ, Lee J, Azrin M, Khalid S
Plain English This study looked at a rare but serious problem that can happen during heart procedures called coronary artery perforation (CAP). The researchers presented a new way to treat a severe type of CAP using a special coil that extends outside the blood vessel, which was successfully combined with a drug-eluting stent to prevent further issues. This method could be a better option for patients who experience this complication, especially those with other health conditions that complicate treatment.
Who this helps: Patients experiencing coronary artery perforation during heart procedures.
Who benefits from percutaneous closure of patent foramen ovalemedical therapy for stroke prevention? In-depth and updated meta-analysis of randomized trials.
2019
World journal of cardiology
Dahal K, Yousuf A, Watti H, Liang B, Sharma S +6 more
Plain English This study looked at whether a procedure called patent foramen ovale closure (PFOC) is better than just medication for preventing strokes. Researchers analyzed data from six trials involving 3,560 patients and found that PFOC reduced the risk of ischemic strokes by 66% and the combined risk of strokes, transient ischemic attacks, and systemic embolisms by 45%. However, it also increased the risk of atrial fibrillation, a type of irregular heartbeat.
Who this helps: This information benefits patients, especially younger men with certain heart conditions, who are at risk of strokes.
Ischemic and bleeding outcomes of triple therapy in patients on chronic anticoagulation undergoing percutaneous coronary intervention: A meta-analysis of randomized trials.
2019
JRSM cardiovascular disease
Dahal K, Mustafa U, Sharma SP, Apte N, Bogabathina H +7 more
Plain English This study looked at two types of treatments for patients who are already taking blood thinners and need heart procedures called percutaneous coronary interventions (PCI). Researchers found that while triple therapy (which includes two types of platelet medications along with a blood thinner) results in a higher risk of bleeding—almost 62% more for major bleeding and over 85% more for minor bleeding—there was no significant difference in the rates of deaths, heart attacks, or strokes compared to double therapy (which includes one platelet medication and the blood thinner). This matters because it highlights a potential risk of triple therapy without offering additional benefits in preventing heart issues.
Who this helps: This helps doctors and patients make informed decisions about treatment options.
Comparison of manual compression and vascular hemostasis devices after coronary angiography or percutaneous coronary intervention through femoral artery access: A meta-analysis of randomized controlled trials.
2018
Cardiovascular revascularization medicine : including molecular interventions
Dahal K, Rijal J, Shahukhal R, Sharma S, Watti H +6 more
Plain English This study looked at two methods for stopping bleeding after heart procedures: manual compression (using physical pressure) and vascular hemostasis devices (special tools designed to control bleeding). The analysis of 44 studies involving nearly 18,800 patients found that manual compression took about 11 minutes longer for bleeding to stop and for patients to start moving. Additionally, it increased the risk of large bruises compared to using hemostasis devices.
Who this helps: This benefits patients undergoing heart procedures by informing them about the safer and quicker option for stopping bleeding after their treatment.
A comparison of standard versus low dose heparin on access-related complications after coronary angiography through radial access: A meta-analysis of randomized controlled trials.
2018
Cardiovascular revascularization medicine : including molecular interventions
Dahal K, Sharma S, Yousuf A, Lee J, Azrin M +3 more
Plain English This study looked at the effects of using standard versus lower doses of heparin during heart procedures done through the wrist (transradial access). They found that while the standard dose led to a lower occurrence of radial artery occlusion (4.2% compared to 10.7% with the lower dose), it also seemed to cause more hematomas (bruises) and required longer compression times after the procedure. Understanding the right heparin dose is important because it can minimize complications and make these procedures safer for patients.
Who this helps: Patients undergoing coronary angiography and their doctors.
Use of rotational atherectomy for reducing significant dissection in treating de novo femoropopliteal steno-occlusive disease after balloon angioplasty.
2018
Journal of geriatric cardiology : JGC
Kim TH, Katsetos M, Dahal K, Azrin M, Lee J
Plain English This study looked at how a technique called rotational atherectomy impacts the risk of serious arterial damage in patients with blockages in their leg arteries after a treatment called balloon angioplasty. Researchers found that only 42.9% of patients who used rotational atherectomy experienced significant damage, compared to 88.2% who did not use it, making atherectomy a more effective option. This is important because lower damage rates could mean fewer patients need extra procedures like stent placement.
Who this helps: This benefits patients with leg artery blockages by reducing the need for more invasive treatments.
Giant coronary aneurysm management with Viabahn covered stent.
2017
Cardiovascular revascularization medicine : including molecular interventions
Kim TH, Marfatia R, Lee J, Azrin M
Plain English This study looked at a 68-year-old woman who had a giant aneurysm in her coronary artery, which continued to grow after she had heart bypass surgery a year earlier. Doctors successfully treated her by placing two special stents into the aneurysm to keep it from getting worse, despite the challenges they faced during the procedure. The patient's aneurysm size increased from 42 by 37 millimeters to 50 by 42 millimeters, emphasizing the need for effective treatment to prevent further complications.
Who this helps: This helps patients with coronary artery aneurysms and their doctors managing such complex cases.
Retrograde Use of Frontrunner Catheter in Superficial Femoral Artery for Flushing Long Segment Occlusions Involving Distal Common Femoral Artery.
2017
Annals of vascular diseases
Chavarria N, Kim TH, Azrin M, Lee J
Plain English In this study, doctors treated an 81-year-old woman with a blocked artery in her leg, which affected blood flow. The standard method for treating the blockage didn't work, but they successfully used a special catheter called a Frontrunner to access the blockage from a different angle, allowing for effective treatment. This approach could make it possible to treat similar cases of blocked arteries in patients, improving their chances of recovery.
Who this helps: This helps patients with leg artery blockages.
Jetstream XC Device for Treatment of Long Viabahn Stents Occlusions in the Superficial Femoral Artery: A Report of Two Cases.
2017
Annals of vascular diseases
Kim TH, Chavarria N, Dahal K, Azrin M, Lee J
Plain English This study looked at two patients who had blockages in their superficial femoral arteries due to Viabahn stents that had formed blood clots. Using the Jetstream XC device, which removes blockages by cutting and suctioning them out, both patients were successfully treated, showing that this approach can help clear these tough blockages. This matters because it provides a new option for patients suffering from complications related to Viabahn stents, improving their chances of better blood flow and reduced risk of limb problems.
Who this helps: This helps patients with blocked arteries after receiving Viabahn stents.
Transulnar versus transradial access for coronary angiography or percutaneous coronary intervention: A meta-analysis of randomized controlled trials.
2016
Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions
Dahal K, Rijal J, Lee J, Korr KS, Azrin M
Plain English This study looked at two different methods for accessing arteries during heart procedures: the transulnar access (TUA) and transradial access (TRA). Researchers found that TUA had similar safety and effectiveness to TRA when performed on 2,744 patients, but it resulted in more punctures and a higher likelihood of needing to switch to a different access point (TUA had about 2.31 times the risk of crossover compared to TRA). This matters because using the right access method can reduce complications during heart procedures, making them safer for patients.
Who this helps: Patients undergoing coronary angiography or intervention procedures.
Innovation in Data Abstraction, Education, and Consistent Application of Best Practice Guidelines: Experience and Real-World Results from a University Hospital in a Cost-Centric Environment.
2016
Connecticut medicine
Lakireddy P, Canning P, Lee J, Azrin M, Vashist A
Plain English This study looked at how a hospital improved its care for patients with severe heart conditions by following best practice guidelines and involving Emergency Medical Services (EMS) in treatment decisions. As a result of these changes, the hospital's performance on heart attack care metrics rose significantly, with a 97.5% success rate in the first quarter of 2014 and individual measures exceeding 95%. This matters because it shows how teamwork and adherence to guidelines can lead to better patient outcomes without needing extra funding.
Who this helps: Patients experiencing acute coronary syndromes.
Multi-vessel versus culprit-vessel and staged percutaneous coronary intervention in STEMI patients with multivessel disease: a meta-analysis of randomized controlled trials.
2014
Cardiovascular revascularization medicine : including molecular interventions
Dahal K, Rijal J, Panta R, Lee J, Azrin M +1 more
Plain English This study looked at how different treatment approaches for heart attacks that involve multiple damaged blood vessels affect patient outcomes. It found that using a multi-vessel approach instead of just addressing the main problem (culprit vessel PCI) significantly reduced the chance of serious complications, like additional heart attacks and the need for further procedures, by nearly half (46% less risk). However, there was no difference in overall survival between the two methods.
Who this helps: This benefits patients with heart attacks caused by multiple blocked vessels.
Exercise during cardiac catheterization distinguishes between pulmonary and left ventricular causes of dyspnea in systemic sclerosis patients.
2013
The clinical respiratory journal
Hager WD, Collins I, Tate JP, Azrin M, Foley R +2 more
Plain English This study looked at how exercise during cardiac testing can help identify the reasons for shortness of breath (dyspnea) in patients with systemic sclerosis (SSc). They found that out of 173 patients tested, 53 showed increased pulmonary pressures during exercise, with 6 having a condition called exercise-induced pulmonary arterial hypertension (EIPAH) and 47 having left ventricular diastolic dysfunction (DD). Understanding these differences is important because it can guide more effective treatment for these patients.
Who this helps: This helps doctors by providing clearer diagnostic tools for managing SSc patients who experience shortness of breath.
Survival of geriatric idiopathic pulmonary arterial hypertension patients.
2011
Connecticut medicine
Foley RJ, Wilcox D, Walsh SJ, Azrin M, Hager WD
Plain English This study looked at elderly patients diagnosed with idiopathic pulmonary arterial hypertension (IPAH) to see how long they lived compared to what was expected based on a prediction formula. Researchers examined 20 patients over 65 years old and found that instead of the predicted 9.4 deaths, only 3 patients died during the follow-up, indicating these patients had a survival rate of just 31.9% of what was expected. This matters because it shows that specific treatments for IPAH may work better than anticipated in older adults.
Who this helps: This helps patients with IPAH and their doctors understand the effectiveness of treatments in older patients.
Rheolytic thrombectomy with percutaneous coronary intervention for infarct size reduction in acute myocardial infarction: 30-day results from a multicenter randomized study.
2006
Journal of the American College of Cardiology
Ali A, Cox D, Dib N, Brodie B, Berman D +8 more
Plain English This study examined whether adding a procedure called rheolytic thrombectomy (RT) to the standard treatment for heart attacks (known as percutaneous coronary intervention or PCI) could reduce the size of heart damage and improve blood flow. Researchers followed 480 patients with severe heart attacks, and found that those who received RT had a slightly smaller amount of heart damage (9.8% vs. 12.5%) but also had higher rates of complications within 30 days (6.7% vs. 1.7%). This matters because it raises concerns about the safety and effectiveness of adding RT to standard treatment for severe heart attacks.
Who this helps: This helps doctors making treatment decisions for patients undergoing procedures for heart attacks.
Evaluation of routine functional testing after percutaneous coronary intervention.
2004
The American journal of cardiology
Eisenberg MJ, Blankenship JC, Huynh T, Azrin M, Pathan A +8 more
Plain English This study looked at what happens when patients undergo a common heart procedure called percutaneous coronary intervention (PCI). Researchers assigned 348 patients to either routine testing after the procedure or tests only when necessary. They found no significant difference in how long patients could exercise on a treadmill or in their overall quality of life after 9 months, indicating that routine testing doesn't provide extra benefits.
Who this helps: This helps doctors decide whether routine testing is needed after PCI for their patients.
Plain English This research focused on improving treatment options for patients with ischaemia, a condition where blood flow is restricted. Scientists explored ways to encourage the growth of new blood vessels using specific growth factors and different delivery methods. Early clinical trials are showing promising results, indicating that these new therapies might be effective in treating ischaemia.
Who this helps: This helps patients suffering from ischaemia who have not responded to existing treatments.
In vitro evaluation of c7E3-Fab (ReoPro) eluting polymer-coated coronary stents.
2000
Cardiovascular research
Baron JH, Gershlick AH, Hogrefe K, Armstrong J, Holt CM +4 more
Plain English This study looked at how well a drug called c7E3-Fab (ReoPro) can be attached to and released from special coronary stents, which are used to keep blood vessels open. The researchers found that after soaking stents in a c7E3-Fab solution, they could attach a significant amount of the drug (about 1,146 nanograms per centimeter) and that it can stay on the stents for a long time, releasing 53% of it even after 12 days. This is important because it could help reduce serious complications like blood clots and re-narrowing of blood vessels in patients after stent placement.
Who this helps: Patients with coronary artery disease who may face risks of complications after stent placement.