Open AccessJournal Article
Some effects of motor car driving on the normal and abnormal heart.
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In this article, the authors found that healthy motor-racing drivers increased their heart rates to 180/min. in the few minutes before the start of a race and to above 200/min while racing.Abstract:
Electrocardiograms were recorded in experienced motor-car drivers accustomed to busy city traffic while driving their own cars along familiar routes. The majority with normal hearts or a history of coronary heart disease increased their heart rates; brief periods when the rate exceeded 140/min. were recorded in both groups. ST changes not caused by tachycardia developed in 3 out of 32 normal drivers. Of 24 drivers with coronary heart disease 13 increased their ST and T abnormalities, the changes being gross in six. A further five developed multiple ventricular ectopic beats. Two coronary drivers experienced anginal pain and two left ventricular failure. Healthy motor-racing drivers increased their heart rates to 180/min. in the few minutes before the start of a race and to above 200/min. while racing.Little or no change in the plasma catecholamine levels was noted in three coronary subjects immediately after a city drive compared with resting levels. All the racing drivers showed a considerable increase in noradrenaline, and in one instance adrenaline, immediately after racing.Persons in whom angina is easily provoked when driving or who are in borderline left ventricular failure should be advised not to drive.read more
Citations
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References
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Journal ArticleDOI
Ventricular Function I. Starling's Law of the Heart Studied by Means of Simultaneous Right and Left Ventricular Function Curves in the Dog
Stanley J. Sarnoff,Erik Berglund +1 more
TL;DR: The concept of a family of Starling or ventricular function curves adds a third dimension to the adaptive capacity of the heart as put forth by Frank and Starling.
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Regulation of ventricular contraction. Influence of cardiac sympathetic and vagal nerve stimulation on atrial and ventricular dynamics.
TL;DR: Data from efferent stimulation of the vagus nerve and of the left stellate ganglion are believed to comprise a reasonably comprehensive description of the means available to the central nervous system for directly inducing acute changes in the activity of the heart.
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Depression of ventricular contractility by stimulation of the vagus nerves.
TL;DR: In three different types of canine heart preparations, it was demonstrated that efferent vagal stimulation exerts a potent, negative inotropic influence upon the ventricular myocardium.
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Effects of high oxygen on coronary flor and heart force
HB Daniell,EE Bagwell +1 more
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On some Points in the Innervation of the Mammalian Heart
W. M. Bayliss,Ernest H. Starling +1 more
TL;DR: This research started with a view to determining how far the electrical events accompanying the contraction of the mammalian heart were exactly analogous to those occurring in the frog and tortoise, and especially with regard to the influence of the two sets of cardiac nerves on conduction between auricles and ventricles.