Showing papers in "American Heart Journal in 1953"

TL;DR: Electrode needles are described which have a minimal lesion effect and allow the exact positioning of as many as eleven electrodes to be placed in one ordinary injection needle.

TL;DR: If an investigator wishes to use autopsy data on disease incidence as a possible clue to the etiology or interrelationships of diseases, he should first make a list of his assumptions regarding the absence or unimportance of bias from the various sources.

TL;DR: The pattern of the RS-T segment in Leads V3 through V6 may occur as a normal variant and can be confused with the pattern of acute pericarditis or early myocardial infarction.

TL;DR: The pathologic basis for the Bernheim syndrome is examined, and it is shown that the method of dissection used by Bernheim and his followers was inadequate for demonstrating obstruction of the right ventricular outflow tract.

TL;DR: Of all the components of Q-T, the RS-T segment was the most elastic, showing the greatest differences between the sexes and at high and low heart rates.

TL;DR: The increased summer frequency of this illness is entirely different from previous reports from northern United States cities where the greatest number of cases have been found to occur during the winter months.

TL;DR: Flow through a partially stenotic collapsible vessel sets up a repetitive phenomenon of opening and closing of the tube, and sounds with a murmurlike quality are produced, due to the repetitive interchange of the energy of the stream from lateral pressure to velocity.

TL;DR: It is concluded that surgery is unlikely to be of benefit in cases of Ebstein's syndrome, and that the diagnosis can usually be made by careful consideration of the clinical and fluoroscopic findings, assisted by angiocardiographic and phonocardiography.

TL;DR: A study of pressures in the right side of the heart and pulmonary artery of eighteen normal subjects and a review of the findings of other authors in a total of 54 additional subjects indicated the following range limits of normal pressure in mm Hg.

TL;DR: A cancellation coefficient has been devised which permits quantitative evaluation of mirror pattern excellence and the existence of deceptive “false” mirror patterns is pointed out and demonstrated.

TL;DR: A method has been described for constructing relatively simple two-dimensional models of the human body which demonstrate the quantitative relationships between currents of cardiogenic origin and the various extremity leads of the electrocardiogram.

TL;DR: The suddenness and severity of onset appeared to be the distinguishing feature—the more sudden and severe the onset, the more likely a rapid progression into the malignant phase.

TL;DR: The lipole theory is a valid, workable concept for electrocardiographic interpretation of patients as well as normal subjects and it is concluded that the poorer cancellation in some patients is due to the interference of local patterns.

TL;DR: An increased excretion of urinary salt-retaining substances has been found in patients with congestive heart failure by a biological assay procedure based on the urinary sodium-24 excretion in adrenalectomized rats.

TL;DR: The response of the electrocardiogram and ballistocardiogram to exercise and smoking in 200 subjects has been reported and administration of nicotine base sublingually elicited ballistOCardiographic alterations which were similar to those observed after smoking in 10 subjects.

TL;DR: Mitral valvular disease prevents the overshoot in blood pressure and bradycardia normally seen after a Valsalva maneuver by preventing sufficient blood from reaching the periphery in the post-straining period despite normal reflexes, and tetraethylammonium chloride prevents this overshoot by blocking vasopressor reflexes.

TL;DR: Anomalous atrioventricular excitation produces changes in the QRS complex which simulate myocardial infarction, and it conceals the presence of myocardials by preventing the development of theQRS abnormalities which are diagnostic of this lesion.

TL;DR: Considering the fact that the unfavorable prognosis of beriberi heart disease in certain cases is due to the prolonged duration of thiamine deficiency leading to an irreversible myocardial fibrosis, the early recognition of this condition is emphasized, since appropriate therapeutic measures at this time may result in a complete cure.

TL;DR: Commissurotomy has afforded beneficial results to many cases of mitral stenosis, suggesting further operative treatment of this disease, and thorough hemodynamic studies are still needed to form proper indications and contraindications.

TL;DR: A ballistocardiograph has been constructed which is bound so weakly to the surroundings that the displacement of the center of gravity of the blood, caused by the action of the heart, can be measured.

TL;DR: The high incidence of abnormal ballistocardiograms from clinically normal persons in the older age groups was pointed out and the need for caution in attributing clinical significance to these records was stressed.

TL;DR: In patients with advanced congestive heart failure, one form of auricular arrhythmia is a relatively common manifestation of serious digitalis intoxication and should be possible to abolish the tachycardia by the administration of potassium and to induce it by depleting body potassium.

TL;DR: A ballistocardiograph is described which is designed to give a record of the force acting upon the "total body mass" and typical and calibrated records are shown and discussed.

TL;DR: A method published by Brinkman and Zijlstra is referred to, by which it is possible to determine the degree of oxygenation of blood samples in vitro, and the fact is used, that the color of the light reflected by the blood depends on the percentage oxygen saturation.

TL;DR: A case of Marfan's syndrome exhibiting medial degeneration and aneurysmal formation with incomplete rupture of the pulmonary artery is reported with a review of the literature.

TL;DR: The analysis of 412 cases of myocardial infarction showed that the incidence in Ashkenazi Jews was disproportionately high, whereas Oriental Jews showed an incidence rate of 5.3 per cent only, although today they constitute at least 26 per cent of the country's population and were never less than 12 per cent during the period reviewed.