| Autor: |
E, Montani, C, Candotti, M O, Triulzi, R, Modesti, G C, Maggi |
| Rok vydání: |
1986 |
| Předmět: |
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| Zdroj: |
Giornale italiano di cardiologia. 16(11) |
| ISSN: |
0046-5968 |
| Popis: |
We examined fifty patients aged from 15 to 35 years, mean 23 +/- 5, with mitral valve prolapse (MVP) documented by two-dimensional echocardiography in the apical 4-chamber view as well as in the parasternal-long axis. The patients have been submitted to 4 tests: Valsalva maneuver, standing and exercise test and 24 hours ambulatory ECG monitoring. Fourty-five healthy subjects of similar age and sex served as controls. During the standing test the patients with MVP showed a significantly faster heart rate than the control subjects both in resting and in the standing position; during the exercise test they exhibited higher prevalence of ST segment and T wave abnormalities disappearing at the peak of the exercise. These observations support the hypothesis of a hyperadrenergic state. The greater bradycardia showed during the Valsalva maneuver, the lower heart rate and the higher incidence of bradyarrhythmias and A-V blocks during the sleeping period suggest an increased vagal tone. Our results suggest therefore that in subjects with MVP a dysfunction of both, sympathetic and parasympathetic nervous system is present. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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