A68-year-old woman with exertional chest discomfort was referred for cardiac catheterization. Her medications did not include atrioventricular (AV) nodal blocking agents, and she had no prior history of dizziness or syncope. Her admission ECG was normal, including a normal axis, PR interval, and QRS morphology and duration (Figure 1). Right heart catheterization and coronary angiography demonst...

background: differences in the quantity and distribution of coronary veins between patients with ischemic and non-ischemic cardiomyopathy might affect the potential for the left ventricular (lv) lead targeting in patients undergoing cardiac resynchronization therapy (crt). in the current study, we assessed and compared the suitability of the coronary venous system for the lv lead placement in i...

Large intercoronary communications in the absence of obstructive coronary artery disease constitute a very rare coronary artery anomaly in which there is a readily visible connection between the 2 coronary arteries with a unidirectional or bidirectional blood flow; consequently, this anomaly may be misinterpreted as a functioning collateral vessel, indicative of an unrecognized proximal coronar...

INTRODUCTION AND OBJECTIVES Although the diagnostic accuracy of CT in the non-invasive assessment of coronary arteries and grafts is known to be high, only a few studies have investigated the technique's reliability for the combined assessment of native coronary arteries, grafts, and vessels lying distal to anastomoses. The aim of this study was to evaluate the diagnostic accuracy of 64-slice C...

A 44 years old male patient with acute coronary syndrome and polycystic kidney disease is described. Coronary angiography showed ectatic coronary arteries. Polycystic kidney disease is the most common inherited kidney disorder which is commonly associated with extra renal manifestations including cardiovascular conditions. Involvement of vessels may lead to arterial aneurysms which most commonl...

A 57-year-old woman came to our attention for the evaluation of recurrent episodes of syncope associated with tachycardia and prolonged hypotension. She did not have a history of hypertension. Three years previously (July 2002), while coming out from the swimming pool, she felt deep malaise, nausea, palpitations, light headedness, no chest pain. She describes the first episodes as a near-syncop...

Coronary artery fistulae (CAF) are rare anomalies. They are vascular communications between the coronary arteries and other cardiac structures, either cardiac chambers or great vessels. There can be considerable variation in the course of a coronary artery fistula. We report a case of a coronary artery fistula between the left circumflex coronary artery and the right and left atria. CAF are oft...

OBJECTIVES Evaluation of collateral vascular circulation according to hemodynamic variables and its relation to myocardial ischemia. BACKGROUND There is limited information regarding the hemodynamic quantification of recruitable collateral vessels. METHODS Angiography of the donor coronary artery was performed before and during balloon coronary occlusion in 63 patients with one vessel disea...

E756 CMAJ, August 9, 2011, 183(11) © 2011 Canadian Medical Association or its licensors An 82-year-old man presented with fa tigue and was diagnosed with bradycardia, associated with third-degree heart block. The patient had required implantation of bare-metal stents in each of the major epicardial vessels nine years previously, but was currently free of angina. Because of a modest rise in his ...

Right Coronary Artery (RCA) originating from left anterior descending artery is a very rare congenital coronary artery anomaly. A 66-year-old man presented with hypertension and complaints of exertional chest pain. The angiography was performed. Aortic root angiography showed no coronary ostium originating from the right sinus of valsalva. Right coronary artery was visualized as anomalously ori...