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P F Howard

Publications and source records attributed to P F Howard.

5 recordsLinked to original sources
PubMed1976

Correlation of electrocardiogram and vectorcardiogram with coronary occlusion and myocardial contraction abnormality.

Electrocardiograms and Frank vectorcardiograms were recorded in 156 consecutive patients with total occlusion of at least one coronary artery (on arteriography) and associated left ventricular contraction abnormality (on ventriculography). The angiograms and cardiograms were independently reviewed. In the presence of single vessel occlusion, appropriate vectorcardiographic diagnosis of myocardial infarction was determined in 118 of 156 cases (76 percent) compared with a lower electrocardiographic detection rate in 77 of 156 cases (49 percent). Findings diagnostic of two coexisting infarctions were observed in 71 percent of vectorcardiograms and 37 percent of electrocardiograms in 51 patients with double vessel occlusion and two areas of left ventricular dyskinesia. The vectorcardiographic detection rate was similarly superior to the electrocardiographic rate in the presence of subtotal coronary occlusion and myocardial asynergy in single (73 percent versus 53 percent) and double (53 percent versus 28 percent) vessel disease. The incidence rate of false positive diagnoses was 3 percent for electrocardiography and 4 percent for vectorcardiography. It is concluded that the vectorcardiogram is superior to the electrocardiogram in the diagnosis of obstructive coronary artery disease and left ventricular contraction abnormality.

Adult↗
PubMedDate not supplied

The echocardiographic diagnosis of calcified mitral annulus.

Echocardiograms were recorded in six patients with calcification of the mitral annulus. Echocardiographic sweep from the aorta to the left ventricular cavity revealed dense echoes, representing annulus calcification, posterior to the mitral valve. Characteristic calcium deposits in the region of the mitral annulus were detected on the chest roentgenogram of only a single subject. Cardiac fluoroscopy fluoroscopy demonstrated calcified mitral annulus in all patients. In one patient, coexisting calcified mitral annulus and proven pericardial effusion were diagnosed echocardiographically. It is concluded that the echocardiogram represents a useful noninvasive technic for the diagnosis of calcified mitral annulus.

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