White Coat Reflex.

Dr. Zayed | Published : 27, JUNE 2025. Cardiovascular disease remains the leading cause of mortality globally, with myocardial infarction and coronary artery disease (CAD) accounting for a significant burden. While pharmacological advances have revolutionized acute management, long-term recovery and secondary prevention still hinge on modifiable factors. In this context, cardiac rehabilitation (CR) has emerged as a powerful, evidence-based intervention with remarkable potential to improve outcomes. What is Cardiac Rehabilitation? Cardiac rehabilitation is a multidisciplinary, supervised program that typically combines: Structured physical exercise Patient education and counseling Behavioral strategies to reduce cardiovascular risk factors , such as dyslipidemia, hypertension, obesity, and smoking. These programs are delivered in phases, often beginning in the inpatient setting and continuing into outpatient or home-based formats, tailored to individual patient needs. Mortal...

Dr. Zayed | Published : 19, JUNE 2025. Introduction Diabetes mellitus is not only a metabolic disorder but also a potent cardiovascular risk factor. Patients with diabetes are predisposed to atypical presentations of myocardial ischemia and infarction. Among these, the absence of chest pain traditionally a cardinal symptom of myocardial infarction can delay diagnosis and treatment, thereby increasing morbidity and mortality as it is overlooked and misdiagnosed. This phenomenon is attributed to "anginal equivalents" , particularly prevalent in diabetic populations. Understanding Anginal Equivalents Anginal equivalents refer to symptoms of myocardial ischemia that do not involve classic chest discomfort, and presents with other unique symptoms which are as critical and dangerous as chest pain.  These usually are exacerbated and alleviated in ways similar to classic angina . therefore,  CAD in diabetic patients poses diagnostic and therapeutic challenges for clinicians, espec...

Dr. Zayed | Published : 21, May 2025. Coronary Subclavian Steal Syndrome (CSSS)  is rare but clinically significant condition that arises in patients with  aorto-coronary bypass grafts , particularly when the  internal mammary artery (IMA)  is used as a conduit. It involves  retrograde flow through the IMA graft , typically due to a  hemodynamically significant stenosis or occlusion of the ipsilateral subclavian artery  proximal to the origin of the graft. LIMA TO LAD CABG Etiology: atherosclerosis Narrowing, hardening of arteries due to plaque buildup Takayasu disease (least common) Chronic inflammation of aorta, large vessels Giant cell arteritis Blalock Taussig shunt Surgical procedure to increase blood flow to lungs; tube placed between subclavian, pulmonary arteries Thoracic aortic dissection Thoracic outlet compression Interrupted aortic arch Congenital aortic coarctation Pathophysiology In CSSS, a proximal  subclavian art...

Dr. Zayed | Published : 12, May 2025. Introduction: MB is a congenital anatomic anomaly characterized by a variable length of coronary artery beneath a section of  myocardium resulting in a Dynamic stenosis (vs static stenosis i.e atherosclerosis)  that varies with cardiac cycle, heart rate, and sympathetic tone . It mainly involves Left anterior descending artery than right coronary and LCX.  The muscle overlying the artery is termed a Myocardial Bridge (MB) , and the intramyocardial segment is referred to as a  Tunneled artery . Coronary angiogram during systole vs diastole in MB for many years myocardial bridging was thought to be non fatal, the reason being coronary blood flow happens during diastole 85% of the time in an individual and the bridge contracts during systole which hinders the blood in remaining 15% of the time. it was later understood this band of tissue not just obstructs blood during systole but also during early diastole due to delayed relaxa...

  Dr. Zayed | Published : 07, May 2025. Introduction Diagnosing acute myocardial infarction (AMI) in the presence of left bundle branch block (LBBB) remains a major clinical challenge. LBBB alters both depolarization and repolarization, leading to secondary ST-T changes that can obscure or mimic signs of acute ischemia. This makes standard STEMI criteria unreliable, necessitating specialized tools like the Sgarbossa and Modified Sgarbossa Criteria. What Is LBBB and Why It Matters LBBB occurs when electrical conduction through the left bundle branch is delayed or blocked. As a result: The left ventricle depolarizes later than the right QRS complexes become wide (>120 ms) ST segments and T waves are secondarily altered These changes disrupt the typical ECG patterns of myocardial infarction, especially ST elevation, leading to potential under- or over-diagnosis. Pathophysiological causes of LBBB include: Myocardial infarction, especially involving the anterior wall. Left ventricula...

Dr. Zayed | Published : 03, May 2025. Diagnostic cardiac catheterization, though regarded as a relatively safe and essential procedure in modern cardiovascular medicine, is not devoid of complications. These complications can be broadly categorized into cardiovascular and non-cardiovascular events, with further subdivisions based on the anatomical systems involved. Understanding these complications and their underlying mechanisms is essential for both clinical preparedness and patient safety. Cardiovascular complications  remain the most directly attributable outcomes of cardiac catheterization and are best understood by separating them into C ardiac and vascular events. Cardiac Complications: Cardiac complications include Myocardial infarction , Arrhythmias  and Traumatic injury to the vasculature.  Myocardial infarction   although rare in diagnostic procedures, can result from  Coronary artery dissection, perforation, Stent Thrombosis  formation due to...