The cardiac pressoreceptors and the heart enlargement
| Autor: | S. E. Labal, O. L. Catanzaro, J.L. Pola, A.C. Taquini, A. Martinez Seeber |
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| Rok vydání: | 1974 |
| Předmět: |
Bradycardia
medicine.medical_specialty Baroreceptor Time Factors Physiology Blood Pressure Cardiomegaly Distension Biochemistry Muscle hypertrophy Body Water Heart Rate Internal medicine Heart rate medicine Animals business.industry Cardiac enlargement Myocardium Body Weight Sodium Anemia Heart DNA Diet Rats Endocrinology cardiovascular system Reflex Cardiology RNA Heart enlargement medicine.symptom business |
| Zdroj: | Archives internationales de physiologie et de biochimie. 82(5) |
| ISSN: | 0003-9799 |
| Popis: | The effect of the cardiac distension on the heart rate was studied in two kinds of cardiac enlargement (trained rats and nutritional anemic animals) and compared with normal ones. In the trained animals the cardiac distension produced an increase in the cardiac rate while no modifications were observed in the nutritional anemic rats. These results are different to those obtained in the renal hypertensive rats where the cardiac distention produced bradycardia. The enlargement of the hearts of the trained animals was due to an hypertrophy of the muscle fibres and in the nutritional anemic rats to an increase in the number of cells. This was established by the determination of the nucleic acids. No modifications were observed in the water and sodium contents in any of the groups studied.These results suggest that the alteration observed in the cardiac pressoreceptor reflex in hypertensive rats is not due to the enlarge-ment of the heart. |
| Databáze: | OpenAIRE |
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