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Biomedical subjects

A Gemelli

Publications and source records attributed to A Gemelli.

24 records · Page 2Linked to original sources
PubMedDate not supplied

Circadian rhythm of sinoatrial conduction time assessed by 24 hours ECG monitoring.

SACT was evaluated in 50 subjects during 24 hours ECG monitoring. All of these subjects presented frequent atrial beats with no evidence of bradyarrhythmias. SACT was measured in accordance with Strauss' formula (SACT = P2P3 - P1P1/2). Twenty-four hours recording were divided in to 4 time intervals, 6 hour each, starting 7 o'clock. The SACT is higher during nighttime than during daytime. The phenomenon is, presumably, attributable to predominance of the para-sympathetic tone during the night.

Adolescent↗
PubMedDate not supplied

Experimental study on the correlation between cardiac function and ovarian hormones.

Results of the study of cardiac function carried out on young women during various phases of the menstrual cycle were correlated to those obtained after acute administration of progesterone. In all cases systolic time intervals reveals a reduction of mechanical systole and of preejection. Direct action progesterone on cardiac function by an unknown mechanism was confirmed.

Adult↗
PubMedDate not supplied

Cardiovascular effects induced by progesterone administration.

The Authors have studied cardiovascular effects induced by progesterone administration. The results obtained in the present investigation reveal a significant reduction in O-S2 and PEP in the absence of modifications in the values of the other parameters of systolic time intervals. The results confirm the hypothesis that progesterone exerts an adrenergic effect upon cardiac function.

Adolescent↗
PubMedDate not supplied

[Neurovegetative regulation of the heart and use of beta-adrenergic blocking agents].

Dynamic adaptation of cardiac activity to respond to various physiological and pathological situations involves the autonomic nervous systems by means of negative feed-back. Beta-blocking drugs are very effective in changing cardiocirculatory regulation equilibria by altering the intensity of the negative feed-back mechanism, or by converting positive feed-back into negative feed-back. A strict and specific indication for the use of these powerful drugs is therefore required. Treatment should also take the form of courses, and be limited in terms of time wherever possible.

Adrenergic beta-Antagonists↗