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- W2467992732 abstract "Cardiac hypertrophy is characterized by marked abnormalities in the contraction/relaxation pattern of the heart. For example, delayed relaxation is a prominent feature, impairing ventricular filling and coronary flow. In intact heart preparations the relative contribution of fibrosis and of the myocardial cell itself to these abnormalities cannot be correctly assessed. Biochemical studies on the mechanisms of impaired contraction and relaxation and hypertensive heart failure are hampered by the fact that 75% of all heart cells are non-myocytes. We therefore established the model of the isolated calcium-tolerant, adult rat cardiomyocyte as a new approach to the investigation of these problems. Contractility was measured using a videomicroscope system with high time resolution (1 ms). Angiotensin II induced a marked relaxation delay in the cardiomyocyte from normotensive rats and showed a moderate positive inotropic effect, whereas isoproterenol had a strong positive inotropic effect but accelerated relaxation. Therefore, angiotensin II is capable of inducing a relaxation delay even in the absence of coronary ischaemia or hypertension. These first results show that the isolated cardiomyocyte model may be a useful approach to investigating the mechanisms of hypertensive heart disease." @default.
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- W2467992732 date "1990-09-01" @default.
- W2467992732 modified "2023-09-23" @default.
- W2467992732 title "Isolated myocardial cells: a new tool for the investigation of hypertensive heart disease." @default.
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- W2467992732 hasPublicationYear "1990" @default.
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