Potassium homoeostasis in the heart was studied during atrial pacing in 20 patients undergoing diagnostic coronary angiography. The potassium concentrations in the coronary sinus and a systemic artery were recorded continuously by means of catheter tip potassium electrodes. Ten patients with coronary artery disease and a positive exercise test developed chest pain and ST segment depression on t...

The role of the carotid sinus reflex in control of the blood flow in the left circumflex coronary artery was studied in nine open-chest dogs anesthetized with chloralose. Flow was measured with an electromagnetic flowmeter. The effects of bilateral common carotid occlusion were examined in a three-part experiment in each dog. (1) Under vagotomy (control) conditions, occlusion of both common car...

BACKGROUND Radiofrequency catheter ablation (RFCA) has been used for the ablation of premature ventricular contractions (PVCs) or ventricular tachycardia (VT). To date, the mapping and catheter ablation of the arrhythmias originating from the left ventricular outflow tract (LVOT) has not been specified. This study investigates the electrocardiogram (ECG) feature of PVCs or VT originating from t...

INTRODUCTION Persistent left superior vena cava represents a congenital vascular defect of the venous system, which often makes standard 58 cm endocardial lead placement impossible. CASE OUTLINE A right chamber approach by the left cephalic vein was tried. This was impossible because standard endocardial lead (SJM Isoflex 5 1646T, bipolar lead, 58 cm in length, body diameter 7 French) was too...

A 47 year-old female of south Asian origin presented with acute pulmonary oedema. Her background included previous investigation for bilateral lung nodules (which remain of uncertain aetiology) and complete heart block leading to dual chamber permanent pacemaker implantation one year previously. A transthoracic echocardiogram identified an unruptured aneurysm of the right coronary sinus of Vals...

Coronary arteriovenous fistula is a rare entity and is mostly diagnosed and corrected in early childhood. We report the case of a 59-year-old female patient who was presented with chest pain during exertion for 3 months because of an aneurysmatic circumflex artery and coronary sinus fistula. We successfully ligated the circumflex artery close to the main stem and to the coronary sinus. The firs...

The responses of eicosanoids to acute myocardial ischemia induced by either exercise stress testing (EX) or percutaneous transluminal coronary angioplasty (PTCA) were investigated in 23 patients with effort angina pectoris (EAP). EX was useful procedure to determine the therapeutic plan in each cases, and PTCA is the novel therapeutic operation for EAP. The relations between these metabolites a...

BACKGROUND Although coronary sinus catheter-related injuries (CSCRIs) are rare, they are potentially lethal. The purpose of this study was to evaluate such injuries, the repair methods used, and to identify related risk factors for mortality. METHODS A retrospective review of 10,552 cardiac surgical procedures from 1995 to 2000 in which retrograde cardioplegia was used revealed 10 cases (n = ...

Chronic total occlusion of an anomalous right coronary artery arising from left coronary sinus is uncommon. We are describing a case of a 71 years old patient presented with severe chest pain along with exertional dyspnea with an inferior wall myocardial infarction. Coronary angiography showed anomalous right coronary artery originating from left coronary sinus having chronic total occlusion in...

AN aneurysm restricted to the left aortic 1A.t sinus is extremely rare. Aneurysms of an aortic sinus most often involve the right (related to the right coronary artery) or the posterior (noncoronary) sinuses. The left aortic sinus may participate with the other two in aneurysmal dilatation, such as occurs in the Marfan syndrome. Described in this communication is an aneurysm that involved the t...