نتایج جستجو برای: coronary sinus flow
تعداد نتایج: 695494 فیلتر نتایج به سال:
OBJECTIVE To determine whether increased plasma concentrations of endothelin-1 (ET-1) and big endothelin (BET) play a role in the regulation of coronary circulation in patients with idiopathic dilated cardiomyopathy (IDCM). SETTING Tertiary referral centre for cardiac diseases. PATIENTS Fourteen patients (eight male/six female; mean (SD) age 59 (9) years) with IDCM (ejection fraction 36 (9)...
Eleven men with coronary artery disease were studied to determine whether they would manifest inappropriate coronary vasoconstriction in response to mental stress. Mental stress was induced by having the patient perform difficult mental arithmetic in time with a clicking metronome. Aortic blood pressure and thermodilution coronary sinus blood flow were recorded continuously before and during th...
Eleven men with coronary artery disease were studied to determine whether they would manifest inappropriate coronary vasoconstriction in response to mental stress. Mental stress was induced by having the patient perform difficult mental arithmetic in time with a clicking metronome. Aortic blood pressure and thermodilution coronary sinus blood flow were recorded continuously before and during th...
A continuous and quantitative analysis of the uneven distribution of coronary blood flow was accomplished in anesthetized open-chest dogs using the distribution function of the hydrogen (H2) clearance time constant. The distribution function was derived by analysing the H2 washout curves in the coronary sinus which were obtained by the H2 clearance method, using platinum electrodes placed in th...
BACKGROUND Recent studies using stress-rest perfusion cardiovascular magnetic resonance (CMR) demonstrated a close correlation between myocardial ischemia and reduced fractional flow reserve (FFR). However, its diagnostic concordance may be reduced in patients with multivessel disease. We sought to evaluate the concordance of adenosine stress-rest perfusion CMR for predicting reduced FFR, and t...
In nine patients with severe left ventricular failure caused by coronary artery disease or congestive cardiomyopathy, left ventricular pressure, cardiac output, coronary sinus blood flow, and myocardial substrate extraction were measured before and during infusion of sodium nitroprusside. Infusion of 55 ,ug/min reduced left ventricular systolic and end-diastolic pressures, peripheral resistance...
A test for the existence of a diffusional shunt in the myocardium was performed in closed-chest, chloralose-anesthetized dogs. Coronary blood flow was varied from 0.21 to 1.17 ml/min per g with a roller pump via a stainless steel coronary perfusion cannula. Following intracoronary artery bolus indicator injection, the coronary sinus venous appearance times of hydrogen, plasma protein labeled wi...
BACKGROUND Albunex is a recently developed ultrasonic contrast agent made from sonicated human serum albumin. The effects on left ventricular hemodynamics, function, and coronary sinus flow of intracoronary Albunex in humans have not been reported. METHODS AND RESULTS Eighteen patients with known or suspected coronary artery disease were examined at the time of coronary arteriography with sim...
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