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Anterior Myocardial Infarction (anterior + myocardial_infarction)
Selected AbstractsEstimation of Global Left Ventricular Function from the Velocity of Longitudinal ShorteningECHOCARDIOGRAPHY, Issue 3 2002Dragos Vinereanu M.D., E.C., Ph.D. Aims: To determine if global ventricular function can be assessed from the long-axis contraction of the left ventricle, we compared pulsed-wave Doppler myocardial imaging of mitral annular motion to radionuclide ventriculography. Methods and Results: We studied 51 patients (56 ± 10 years, 11 women) with a radionuclide ejection fraction of 52 ± 13% (15%,70%). Peak systolic velocities of medial and lateral mitral annular motion correlated with ejection fraction (0.55 and 0.54, respectively; P < 0.001), as did the time-velocity integrals (0.57 and 0.58, respectively; P < 0.001). Correlations were higher in normal ventricles (0.62,0.69) than in patients with previous myocardial infarction (0.39,0.64). Patients with anterior myocardial infarction had the lowest correlations (0.39,0.46). The best differentiation of normal (, 50%) from abnormal (< 50%) ejection fraction was provided by peak systolic velocity , 8 cm/sec for the medial (sensitivity 80%, specificity 89%) or lateral (sensitivity 80%, specificity 92%) mitral annulus. Conclusion: Global left ventricular function can be estimated by recording mitral annular velocity. The implementation of a cutoff limit of 8 cm/sec gave a simple guide for differentiating between normal and abnormal left ventricular systolic function that might be useful clinically in patients without regional wall-motion abnormalities. However, in patients with important segmental wall-motion abnormalities during systole, left ventricular longitudinal shortening is an imperfect surrogate for ejection fraction. [source] Optimization of Repolarization during Biventricular Pacing: A New Target in Patients with Biventricular Devices?ANNALS OF NONINVASIVE ELECTROCARDIOLOGY, Issue 1 2010Cengizhan Türko, lu M.D. Background: Evaluation of repolarization during sequentional biventricular pacing. Methods: Patients with biventricular devices, and left ventricular leads placed to the basal part of lateral left ventricular wall were enrolled. QRS, QTc, JTc, and corrected Tpeak-Tend intervals were compared during sequentional biventricular, left ventricular, and right ventricular pacing. Results: Five patients with nonischemic and five with ischemic cardiomyopathy due to anterior myocardial infarction were enrolled. No correlation was observed between values of repolarization among patients. The optimal values of repolarization were significantly different from values of echocardiographically guided hemodynamic optimization. Two patients with biventricular pacing-induced ventricular fibrillation were successfully treated by reprogramming of V-V delay according to interventricular delay resulting in shorter Tpeak-Tend interval, although delayed effect of amiodarone in one of these patients cannot be ruled out. Conclusions: Patients with biventricular devices may be prone to development of ventricular arrhythmias depending on programmed V-V interval. We suggest that optimization of repolarization may be performed in patients with biventricular pacemakers in the absence of backup ICD and those with frequent episodes of ventricular tachyarrhythmias, although this finding deserves further study. Ann Noninvasive Electrocardiol 2010;15(1):36,42 [source] Complete stent dislodgement after successful implantation-a rare case,,CATHETERIZATION AND CARDIOVASCULAR INTERVENTIONS, Issue 6 2010Hwa Wooi Gan MBBS, MRCP Abstract A successfully deployed stent is normally stable in position and unlikely to be dislodged from the coronary artery. We report a case of complete stent dislodgement after successful implantation in a patient with recent anterior myocardial infarction (AMI). Coronary angulation, a highly calcified coronary artery, an under-deployed stent, and the process of rewiring contributed to this unexpected event. Fortunately, no unwanted complication occurred as a consequence of this event. © 2010 Wiley-Liss, Inc. [source] Radiographic appearance of a left ventricular apical aneurysm with thrombus following a large anterior myocardial infarction: "dumbbell" shaped heartCLINICAL CARDIOLOGY, Issue 4 2004Richard A. Kerensky M.D. No abstract is available for this article. [source] | ||||||||||