ABSTRACT
BACKGROUND: Analysis of mitral flow velocity pattern provides useful variables in the assessment of left ventricular diastolic dysfuntion, but are affected by loading conditions or presence of atrial fibrillation. Thus we assessed intraventricular diastolic flow velocity profile in order to assessment of left ventricular diastolic dysfuntion. METHODS: The study population consisted of 20 subjects with normal left ventricular function(including 7 patients with atrial fibrillation only), 15 patients with hypertensive heart disease, and 14 patients with dilated cardiomyopathy. The flow velocity pattern at the mitral tip was recorded simultaneously with regional pulsed Doppler diastolic velocity patterns at 1, 2, or 3 cm from the mitral tip toward the apex. RESULTS: Inteh normal subjects, early diastolic flow velocity at the mitral tip was maintained at the positions 1 to 3cm away from the tip into the left ventricular carvity. In patients with dilated cardiomyopathy or hypertensive heart disease, peak early diastolic flow velocity decreased form the mitral tip toward the apex more progressively than in the subjects with normal left ventricular function. The same findings were obtained in selected patients group with atrial fibrillation or a normalized mitral flow velocity pattern. CONCLUSION: The assessments of the intraventricular dispersion in peak early diastolic flow velocity may be useful in detecting left ventricular diastolic dysfuntion, particularly in patients with atrial fibrillation or a normalized mitral flow velocity pattern.
Subject(s)
Humans , Atrial Fibrillation , Cardiomyopathy, Dilated , Heart Diseases , Ventricular Function, LeftABSTRACT
BACKGROUND: The purpose of this study is to assess the ability of dipyridamole99mTc-MIBI SPECT to identify and localize coronary artery disease(CAD). METHODS: The study population consists of 60 patients(37 males, 23 females : mean age 57+/-10 years) including 30 with prior myocardial infarction who underwent both dipyridamole99mTc-MIBI SPECT and coronary angiography for the evaluation of chest pain. RESULTS: The sensitivities for detection of CAD(> or =50% and > or =70% coronary stenosis by angiography) by dipyridamole99mTc-MIBI SPECT are 96% and 98% respectively, and specifities are 71% and 73% respectively. The sensitivities for detection of individual diseased vessels(> or =50% and > or =70%) are 79% and 90% for left anterior descending artery(LAD), 53% and 59% for left circumflex artery(LCX), 45% and 53% for right coronary artery(RCA), 64% and 77% for LCX/RCA, 63% and 72% for total. The specificities for detection of individual diseased vessels(> or =50% and > or =70%) are 62% for LAD, 98% and 98% for LCX, 92% and 89% for RCA, 91% and 89% for LCX/RCA, 87% and 86% for total. The concordances for ditection of individual didseased vessels beteen coronary angiography and dipyridamole99mTc-MIBI SPECT are all fair for SAD(Kappa=0.4 in > or =50% stenosis, 0.54 in > or =70% stenosis)LCX(Kappa=0.56,0.63),RCA(Kappa=0.4,0.44) and LCX/RCA(Kappa=0.56,0.67). CONCLUSION: Dipyriddamole99mTc-MIBI SPECT appers to be an useful noninvasive test for both identification and localization of coronary artery disease.
Subject(s)
Female , Humans , Male , Chest Pain , Constriction, Pathologic , Coronary Angiography , Coronary Artery Disease , Coronary Stenosis , Coronary Vessels , Diagnosis , Myocardial Infarction , Tomography, Emission-Computed, Single-PhotonABSTRACT
No abstract available.