Showing papers in "American Heart Journal in 1968"

TL;DR: Volumes calculated from measurements made only on A-P films closely agreed with biplane calculations of volume and the use of single plane techniques did not result in significant errors for the calculation of absolute end-systolic volume or for calculation of stroke volume.

TL;DR: A point-score system is presented for the diagnosis of left ventricular hypertrophy from the ECG and is significantly more sensitive in the presence of combined hypertension and coronary artery disease than in either alone.

TL;DR: The zone of myocardial ischemia as identified by altered dehydrogenase staining remains to be characterized as to its functional capacity with regard to either electrical or mechanical activity.

TL;DR: The original description of the papillary muscle syndrome is extended to include a number of diseases which either clinically or at necropsy have been implicated in the production of papillary muscles dysfunction in the hope that attention will be focused on those diseases, in addition to circulatory insufficiency, which may result in papillary Muscle dysfunction.

TL;DR: A formula is derived for the stress distribution within the myocardium which is assumed to be an isotropic, homogeneous, elastic medium, and this expression is generalized so that it is applicable for the left ventricule which is assuming as either a spherical thick shell, or an ellipsoidalshell, or a paraboloid of revolution.

TL;DR: The brain showed two very unusual lesions, massive necrosis of white matter and disseminated fungal granulomata, and the evidence that the first of these is an anoxic lesion is reviewed.

TL;DR: A series of 11 postmortem cases of ventricular septal defect (VSD) with aortic insufficiency (AI) was presented, and an anatomic classification of VSD with AI was proposed, and their differential diagnosis is of practical clinical importance.

TL;DR: LBNP proved to be a reproducible, effective and practical means to produce hypovolemia and induce vasodepressor syncope.

TL;DR: Physical signs can be sought for in an attempt to differentiate clinically the possible etiology of the disease and its anatomic area of involvement, and correlation of physical signs with the functional anatomy helps to provide an additional scientific basis to the physical examination.

TL;DR: It is apparent that predictions of maximal heart rate could be improved by making a distinction between trained and untrained subjects.

TL;DR: Current concepts on the electrophysiological basis of cardiac arrhythmias have been reviewed, by incorporating some of the latest information with the time-honored theories and observations of previous investigators.

TL;DR: The Stokes-Adams syndrome, heart block complicating acute myocardial infarction, the electrophysiological complications of pacing, the appropriate roles of synchronous vis-a-vis-fixed-rate pacemakers, and the nature and possible applications of coupled and paired pacing were discussed.

TL;DR: The dependability of RVA in the evaluation of TI was studied in 141 patients with congenital or rheumatic disease, finding that RVA can exclude TI but yields false positive studies.

TL;DR: The previously positive T wave of a bipolar manubrium-C5 lead, similar in pattern of V 5 , decreased to half its original size in one subject after three hours of driving.

TL;DR: This study has shown the relatively high incidence of J depression with exercise in both normal subjects and those with coronary disease, and the QXQT and QT ratios were "abnormal" in the majority of cases with coronary artery disease, but also in half of the normals, and were unreliable in the evaluation of ST depression.

TL;DR: The relation of VSD, aneurysm of the sinuses of Valsalva, and prolapsing aortic insufficiency has been discussed and anatomical and angiocardiographic findings of the disease were compared and analyzed.

TL;DR: The majority of the ECG's which showed disappearance of significant Q-deflections did so within two years following infarction; none changed after six years; the disappearance of abnormal Q- deflection was not associated with a better prognosis in these patients.

TL;DR: It is concluded that the release of biogenic amines from platelets plays a significant role in the animal's response to thromboemboli and the dose requirements of heparin necessary to inhibit these events is greater than that generally used in treating pulmonary embolism.

TL;DR: It is concluded that hypertonic peritoneal dialysis is an effective method for the treatment of severe heart failure with sodium dilution with immediate improvement of symptoms and signs of fluid overload.

TL;DR: This article discusses what it considers to be the second most important resistivity change, namely, that occurring in the vicinity of the surface electrodes, due to the relatively low resistance surface layer formed by the muscles girdling the thorax.

TL;DR: The BBV of selected ECG measurements was studied in an all male series consisting of 29 subjects with and 29 without heart disease, and spatial maximum vectors showed the least, instantaneous vectors the greatest, and scalar lead amplitudes intermediate variation.

TL;DR: An extensive review of 18 patients who died after aortic valve surgery indicated that operative cannulation caused fatal mechanical injury in 10 of these patients.

TL;DR: Characteristic features of the entire group, exclusive of Type IId included a posteriorly oriented loop directed toward the “Z” axis and relatively narrow loops especially in the frontal and right sagittal plane, which appear characteristic for the group of patients with PMD.