Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0264733 (ventricular dilatation)
 2,163 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A 21-year-old man died suddenly at a small party. He had had no clinical signs of cardiac disease except for a slightly abnormal electrocardiogram (occasional premature ventricular contractions) since he was 15 years of age. Autopsy examination revealed cardiomegaly (469 g), with right atrial and ventricular dilatation. The right ventricular myocardium was massively replaced with adipose tissue, and there was one isolated fatty lesion in the right side of the ventricular septum. There were no congenital malformations such as a septal defect or valvular deformity. Histologically, muscular fibers remaining in the right ventricular wall showed neither degenerative nor inflammatory changes. An isolated lesion of the ventricular septum consisted of almost complete replacement of the muscle bundles with adipose tissue. Such a pathologic condition has recently been termed right ventricular cardiomyopathy. Postmortem examination is necessary to make a definite diagnosis of the disease, because in most adult cases of the disease, sudden death occurs before there have been any critical signs.
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PMID:Sudden death due to right ventricular cardiomyopathy. 222 Jul 15

Peripartum cardiomyopathy is a rare cardiac disorder. Although left ventricular apical thrombus formation is common in peripartum cardiomyopathy, biventricular apical thrombi formation is a very rare condition in these patients. A 21-year-old woman presented with complaints of dyspnea, orthopnea, paroxysmal nocturnal dyspnea, and palpitations that appeared three months after labor. Transthoracic echocardiography showed severe global hypokinesis, decreased left and right ventricular ejection fraction (left 30%, right 35%), increased left ventricular end-diastolic dimension (60 mm), grade 2 mitral regurgitation, and biventricular apical thrombi. On the second day of admission, she developed global aphasia and right hemiplegia. The patient was successfully treated with recombinant tissue plasminogen activator. Transthoracic echocardiography following treatment showed disappearance of biventricular apical thrombi. She had no neurologic deficit. Treatment for heart failure was continued due to persistence of global hypokinesis and left ventricular dilatation.
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PMID:[Development of biventricular large apical thrombi and cerebral embolism in a young woman with peripartum cardiomyopathy]. 2198 72

Introduction of isoproterenol (an agonist of beta-adrenoreceptors) to rats is one of the widespread experimental models of cardiac failure. It is caused by damage of cardiomyocytes with the subsequent development of substitutive fibrosis. The purpose of the given work was the complex characteristic of cardiac function by means of invasive and noninvasive (echocardiography and impedansometry) methods of research. Isoproterenol was injected twice with a daily interval in dozes 85, 120, 150 or 180 mg/kg. Echocardiographic study of the heart in 2 weeks revealed obvious attributes of cardiac failure (left ventricular dilatation, lowered ejection fraction) in the groups which have received high cumulative dozes of isoproterenol (300-360 mg/kg). The catheterization of the left ventricle in these groups has shown raised enddiastolic pressure, decreased maximal rate of pressure development and fall, and also lowered indices of myocardial contractility and relaxability. In the groups which have received smaller isoproterenol dozes, apparent decrease in relaxability parameters (constants of isovolumic and auxovolumic relaxation) has been revealed at only slightly changed parameters of contractility. A strong correlation between echocardiographic and invasive parameters of myocardial contractility has been found. The phase analysis of the cardiac cycle has shown a lengthening of isometric phases of contraction and relaxation, as well as duration of ejection due to shortening duration of filling of both ventricles. Cardiomyocytes isolated from hearts with obvious cardiac failure responded to electrostimulation by arrhythmic contractions and also by much slowed and incomplete removal of free Ca++ from the myoplasm. Results allow to conclude that relatively smaller extent of myocardial damage is accompanied by decreased relaxability at slightly changed contractility, while at greater degree of damage both processes fail, but delay of relaxation still prevails.
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PMID:[Complex study of the rat heart at isoproterenol damage]. 2510 49