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Biomedical subjects

Y Rozenman

Publications and source records attributed to Y Rozenman.

99 records · Page 6Linked to original sources
PubMed1984

Left ventricular volumes and function during atrial pacing in coronary artery disease: a radionuclide angiographic study.

This study set out to determine the pathophysiologic changes in the left ventricle during atrial pacing in 22 patients with coronary artery disease. Graduated right atrial pacing to a rate of 160 beats/min, or the induction of angina pectoris or significant ST depression was undertaken. Ventricular volumes were measured at rest and at rates of 100, 120, 140 and 160 beats/min using radionuclide angiography. The volumes at a pacing rate of 100 beats/min were used as a reference standard (100%). In the 22 patients with coronary artery disease, left ventricular end-diastolic volume decreased from 118 +/- 3% at rest to 80 +/- 5% at a rate of 160 beats/min; stroke volume from 121 +/- 3% to 54 +/- 5%; and ejection fraction (EF) from 49 +/- 3% to 37 +/- 5%. End-systolic volume decreased from 118 +/- 4% at rest, reached its minimal value of 94 +/- 5% at a rate of 120 beats/min and then increased slightly to 106 +/- 9% at 160 beats/min. Cardiac output and blood pressure did not change significantly. Compared to the control group of 10 normal subjects, the patients had a significantly smaller decrease in end-diastolic volume and end-systolic volume than in normal control subjects. EF in the normal subjects did not change. Blood pressure, cardiac output and stroke volume were similar in both groups. Atrial pacing tachycardia induced reversible ventricular dysfunction with a decrease in EF. Stroke volume was maintained because of relative ventricular dilatation.

Adult↗
PubMed1984

Left ventricular function during atrial pacing: a radionuclide angiographic study.

Multigated radionuclide angiography was performed at rest and during atrial pacing in 10 normal subjects. Left ventricular volumes in diastole and systole were measured by total counts in the region of interest of the left ventricle. Stroke volume, cardiac output, ejection fraction, and rates of ejection for each heart rate were calculated. As heart rate increased, there was a gradual decrease in end-diastolic, end-systolic, and stroke volumes without a significant change in cardiac output and ejection fraction. Ejection fraction rate increased and the uncorrected ejection rate decreased with the increase in heart rate. The normal response to tachycardia induced by atrial pacing was a decrease in ventricular volumes without a change in ejection fraction or cardiac output.

Adult↗
PubMed1984

The hyperacute phase of right ventricular infarction.

In summary, the hyperacute phase of RV infarction presents three possible patterns on the surface ECG (Fig. 3): the typical repolarization picture of hyperacute myocardial infarction, with slope elevation of the ST segment and tall T waves; rounded elevation of the ST segment, where the typical changes are "damped" by negative or posterolaterally directed, LV repolarizing forces; and ST elevation concave upward in the right chest leads, where anteriorly directed, underlying left ventricular ST segment and T wave vectors enhance the hyperacute picture.

Acute Disease↗
PubMed1981

Functional occlusion of a cilioretinal artery.

Functional occlusion of the cilioretinal artery in the presence of central vein occlusion is difficult to prove. We describe a case of central retinal vein occlusion in which cilioretinal artery occlusion developed after iatrogenic lowering of the blood pressure. Fluorescein angiography showed a peculiar hemodynamic sequence that demonstrated a functional origin to the cilioretinal artery occlusion.

Adult↗
PubMed1981

[Conjunctival ocular myosis (Oesterus ovis) about 3 cases (author's transl)].

Conjunctival lesions are the most frequent expression of ocular myiasis encountered in the Mediterranean region. Presenting typically with inflamed and oedematous eyes, and superficial corneal erosions, these affections are rarely diagnosed as they are excluded from the differential diagnosis. Early, adequate treatment will prevent major complications.

Adult↗
PubMedDate not supplied

Age- and gender-related differences in success, major and minor complication rates and the duration of hospitalization after percutaneous transluminal coronary angioplasty.

This report describes the effect of age and gender on the results of balloon angioplasty using current technique and indications. A consecutive group of 2,067 patients who underwent angioplasty at a single institution after 1990 is described. Angioplastic success was 92.2% and similar among men and women and the various age groups. Sixteen patients (0.8%) died, and mortality among women was significantly higher (1.4 vs. 0.6%, p < 0.001). There were no age or gender differences in the rate of Q-wave myocardial infarction and the need for coronary artery bypass. Minor complications such as groin complications (10.5% women, 5.0% men; p < 0.001) and infections (6.4% women, 3.7% men; p < 0.05) were more common in women, and as a result the duration of hospitalization after angioplasty was longer. The length of hospitalization after angioplasty was longer with advanced age, mainly as a result of higher groin complications (p < 0.001), infections (p < 0.01) and renal failure (p < 0.05). We conclude that using current indications and technique, angioplasty can be performed safely with a high success rate. Mortality is higher among women. The length of hospitalization after angioplasty is longer in women and, at advanced age, due to higher rate of minor complications.

Age Factors↗