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Biomedical subjects

I Kronzon

Publications and source records attributed to I Kronzon.

At least 235 records · Page 13Linked to original sources
PubMed1980

Mitral valve systolic click syndrome.

Mitral valve prolapse, although usually a benign condition, can cause incapacitating chest pain or refractory arrhythmias. Among patients undergoing cardiac catheterization for evaluation of chest pain, 50 who were found to have mitral valve prolapse were analyzed. Three patients had neither a click nor a murmur. Echocardiography was diagnostic in 46 patients; two patients had no evidence of prolapse, and two patients had tests that were technically inadequate. Only 15 of the patients demonstrated a normal electrocardiogram.

Adult↗
PubMed1979

Diagnosis of left atrial tumors by coronary angiography and left ventriculography.

The left ventriculograms and pulmonary and coronary angiograms of eight patients with left atrial (LA) tumors were reviewed. The patients' ages ranged from 52 to 65 years. In each case the tumor was outlined during left ventriculography. Coronary arteriography allowed visualization of tumor vessels in six cases (six of seven myxomas). Two of the patients had significant coronary obstructions. It is concluded that a left ventriculogram is a sensitive diagnostic test for the presence of LA tumors. Coronary arteriography is indicated in patients with LA tumors in this age group and is likely to provide independent evidence of the presence of an LA tumor.

Aged↗
PubMed1979

Echocardiographic findings in patients with left superior vena cava and dilated coronary sinus.

Three patients with a left superior vena cava draining into a dilated coronary sinus were studied with cardiac catheterization and echocardiography. The diagnosis was confirmed at operation in two patients. A posterior echo-free space was filled with echoes during injection of contrast medium into the left but not the right arm. This echo-free space was localized to the left atrioventricular groove. This technique established the presence of a left superior vena cava communicating with the coronary sinus and excluded pericardial effusion as the source of the posterior echo-free space.

Adult↗
PubMed1979

Absence of paradoxical pulse in patients with cardiac tamponade and atrial septal defects.

Five patients with atrial septal defect and proved cardiac tamponade had neither paradoxical pulse nor the inspiratory reduction of left ventricular internal dimension associated with this sign. It is assumed that equilibration of flow across the atrial septal defect prevented paradoxical pulse. Patients with a large atrial septal defect and tamponade do not manifest a paradoxical pulse.

Adult↗
PubMed1979

Use of contrast echocardiography in the diagnosis of partial anomalous pulmonary venous connection.

Contrast echocardiography is useful in diagnosing the presence of partial anomalous pulmonary venous connection, particularly when it occurs in association with an atrial septal defect. Injections of saline solution, Cardiogreen or the patient's own blood were made in the inferior vena cava, left atrium and pulmonary veins of 27 patients. In all patients, the inferior vena caval injections showed only right heart clouding with no evidence of a right to left shunt. In 21 patients, the left atrial and pulmonary venous injections showed clouding of both the right and left heart structures, indicating a left to right atrial shunt and normal pulmonary venous connection. In six patients, the left artrial injections showed right and left heart clouding, but the right pulmonary venous injections showed only right heart structures, indicating a left to right atrial shunt with partial anomalous pulmonary venous connection. Contrast echocardiography proved to be a sensitive method of diagnosing the anomalous venous connection without the use of dye curves. The method is not useful when a right to left atrial shunt is present and may show false positive results for partial anomalous pulmonary venous connection it left atrial visualization is not adequate during injection into the pulmonary vein.

Adult↗
PubMed1977

Left internal mammary--left ventricular fistula after Vineberg operation.

This communication presents an unusual complication in a patient who underwent the Vineberg procedure with the formation of an internal mammary to left-ventricular fistula, which caused a new apical diastolic murmur. This represents a previously unreported etiology for the appearance of an apical blowing diastolic murmur.

Coronary Disease↗
PubMed1977

Displacement of the heart by a giant mediastinal cyst.

A giant mediastinal cyst caused marked cardiac displacement, factitious cardiomegaly and clinical and hemodynamic findings suggestive of constrictive pericarditis. The correct diagnosis was established with echocardiography and confirmed with angiography and surgery.

Cardiomegaly↗
PubMed1977

Prolapse of the mitral valve: clinical spectrum and coronary arterial distribution.

Coronary angiograms were reviewed in 31 patients with idiopathic prolapse of the posterior mitral leaflet. There were 19 males and 12 females, ranging in age from 33 to 69. The coronary artery which supplied the posterior descending branch was designated as dominant. There were 27 dominant right coronary arteries and 4 dominant left coronary arteries. Attention was paid to whether the origin of the vessel which courses in the posterior atrioventricular groove branch was from the right coronary artery or the left circumflex. In the dominant right coronary artery group, the arterioventricular groove branch arose from the right coronary artery alone in 6 and from the left circumflex alone in 1 patient, and in 20 patients, from both. In the dominant left coronary artery group, the atrioventricular groove branch arose from the left coronary artery in all 4 patients. The frequency of dominant right coronary artery and left coronary and the origin of the atrioventricular groove branch did not differ in the patients with prolapse of the mitral valve from a control group of 30 patients similarly analyzed. In all instances, the atrioventricular groove branch arose from either the right coronary artery ro the left circumflex, or both. In no case was the arterioventricular groove branch totally absent. The results of this investigation do not support the thesis, previously advanced by others, that prolapse of the mitral valve is related to absence of the left circumflex coronary artery, but indicate a normal range of variation in coronary arterial distribution.

Adult↗
PubMed1977

Pseudocoarctation and mid-arch aortic coarctation.

A 21-year-old woman was found to have a mid-arch aortic coarctation in combination with pseudocoarctation. The angiographic disgnosis was established by left atrial injection after transseptal puncture.

Adolescent↗
PubMed1977

Combined tricuspid and pulmonic stenosis. Clinical, echocardiographic, hemodynamic, surgical, and pathological features.

A 30-year-old man with a history of a murmur since childhood had progressive ascites for 2 years. The patient was found to have severe stenoses of the pulmonic and tricuspid valves with a well-developed right ventricle. Impressive clinical improvement occurred after pulmonic valvotomy, infundibulectomy, and replacement of the stenotic tricuspid valve with a porcine xenograft. The clinical, echocardiographic, hemodynamic, surgical, and pathological features are presented.

Adult↗
PubMed1976

Echocardiographic findings in a patient with primary pulmonary hypertension.

This is a report of the echocardiographic findings in a 9-year-old white female with primary pulmonary arterial hypertension confirmed by catheterization and later at autopsy. The reported findings of an absent "a" wave, a flat diastolic E to F slope, and a midsystolic closure of the pulmonic valve were observed. In addition, tricuspid valve prolapse was noted. Prolapse of the tricuspid valve may be part of the mechanism of tricuspid insufficiency in a patient with pulmonary hypertension.

Autopsy↗
PubMed1976

The clinical and angiographic spectrum of isolated, nondominant, left circumflex coronary disease.

Sixteen of 994 patients with arteriosclerotic heart disease and dominant right coronary arteries had isolated left circumflex obstruction. Of these, 6 patients had significant (75%) narrowing in the main circumflex, 10 in 1 or the marginal branches and 1 in the atrioventricular groove branch. Angina was mild in 5, moderate to severe in 8, and unstable in 1. Four patients had prior myocardial infarction (MI), and 1 had a recent MI complicated by posterior papillary muscle rupture. The EKG was normal in 5, showed an MI in 2, LBBB in 1, RBBB in 2, ST-T wave changes in 3, LVH in 2, and atrial fibrillation in 2. Left ventricular angiography performed in the right anterior oblique projection revealed normal contraction in 9 patients, apical hypokinesis in 4, posterobasal hypokinesis in 1, and diffuse hypokinesis in 2. The left ventribular end diastolic pressure was normal in 11 patients and elevated in 5. The cardiac index was normal in 12 patients and reduced in 2. Isolated, nondominant, left circumflex coronary disease is an uncommon entity in symptomatic patients. However, when present, it may produce significant clinical and hemodynamic impairment.

Adult↗