T ranscatheter aortic valve replacement (TAVR) is a well-established therapy that has revolutionized the management of patients with severe aortic stenosis who are deemed suboptimal candidates for surgery.1-3 Despite increasing experience with and understanding of the procedure and patient selection, TAVR is still associated with unexpected complications, such as paravalvular aortic regurgitati...

Background This study is to evaluate the early results treatment of patients with total occlusion of the left main coronary artery. Total occlusion of the left main coronary artery is a very rare finding in patients with acute coronary syndrome. In these cases, patients present various clinical symptoms, however the symptoms and the survival of these patients depend on the development of collat...

BACKGROUND Coronary artery stabilization and retraction have been a crucial problem in beating heart bypass surgery. Conventional methods such as looping and suspension of the target artery carry risk of coronary artery damage. Above all, these methods do not aid in retraction in coronary arteriotomy. METHODS Five mongrel dogs were used in this study. After intratracheal general anesthesia, m...

In 45 approximately 1-year-old purebred German shepherd dogs, the left circumflex and the right coronary arteries were chronically occluded by implantation of slowly swelling ameroid constrictors. Before the operation, 27 dogs were trained on a treadmill until they could run 8 mph on a 22% incline for 1 hour, 5 days per week. Two weeks after the operation, exercise was gradually resumed and con...

The purpose of this study was to determine if exercise stimulates coronary collateral vessel growth and if exercise after coronary occlusion can promote additional collateral growth. One group of 10 beagles served as control. The second group considered of 10 normal beagles exercised at 50% of maximum O2 consumption 7 days/week for 6 weeks. In the third group, the circumflex was occluded (Amero...

We investigated changes in circumflex, left anterior descending (LAD), and right coronary artery flows as well as changes in collateral flows to these vessels after long-term circumflex occlusion. Coronary and collateral flows of each vessel were determined simultaneously in an isolated heart preparation in which the vasculature was maximally dilated with dipyridamole. The resistances as relate...

THE INCIDENCE and localization of coronary artery occlusion have assumed increasing importance because of the current exploration of cardiac lesions in patients by angiography and surgery. We wish to report the results of a large series that extends the previous studies by Schlesinger and Zoll oia anatomic variations in coronary arterial patterns and on the incidence and localization of coronar...

A 43-year-old man, with a past history of hypertension without regular medical control, presented to our hospital with intermittent chest tightness and shortness of breathing about one day. At emergent department, the blood pressure was 180/110 mmHg, and pulse rate was 78 beats per minute. Troponin I was 3.19 ng/ml. EKG showed V1-V4 ST elevation. Coronary angiography showed near total occlusion...

BACKGROUND Coronary artery spasm (CAS) is defined as a reversible, sudden epicardial coronary artery stenosis that causes vessel occlusion or near occlusion. CASE REPORT In this article, we present a clinical case of CAS in a 48-year-old woman undergoing elective aortic valve replacement surgery for aortic stenosis. On the 3rd post-operative day, the patient suffered from chest pain and dyspn...

The electrocardiogram (ECG) has being used for decades as a reliable and inexpensive tool to diagnose acute myocardial infarction (AMI). ECG diagnosis of an occluded coronary artery is of the utmost importance. We present the case of a 46 year-old man admitted to our hospital for inferior AMI. The ECG findings suggested right coronary artery occlusion. Coronary angiography showed left circumfle...