Biomaterial Database

Left ventricular dynamics during recovery from exercise. 1975

L D Horwitz, and J M Atkins, and S A Dunbar

Left ventricular dynamics during recovery were measured in dogs, 3 min after brief periods of mild, moderate, and severe treadmill exercise. As compared with resting values, stroke volume was unchanged, and the maximum first derivative of the left ventricular pressure was either unchanged or slightly elevated. Increases in heart rate of 20, 26, and 46 beats/min for mild, moderate, and severe exercise appear to be the major factor in augmenting cardiac output during recovery. With moderate and severe exercise, left ventricular end-diastolic diameter increased and continued to be elevated during recovery, whereas end-systolic diameter decreased during exercise but was elevated above resting values during recovery. Therefore, with strenuous exercise, a sympathetic-mediated increase in contractility recedes promptly during the postexercise period but the Frank-Starling mechanism continues to be a factor.

UI	MeSH Term	Description	Entries
D002302	Cardiac Output	The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat).	Cardiac Outputs,Output, Cardiac,Outputs, Cardiac
D004285	Dogs	The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)	Canis familiaris,Dog
D005082	Physical Exertion	Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.	Physical Effort,Effort, Physical,Efforts, Physical,Exertion, Physical,Exertions, Physical,Physical Efforts,Physical Exertions
D006321	Heart	The hollow, muscular organ that maintains the circulation of the blood.	Hearts
D006339	Heart Rate	The number of times the HEART VENTRICLES contract per unit of time, usually per minute.	Cardiac Rate,Chronotropism, Cardiac,Heart Rate Control,Heartbeat,Pulse Rate,Cardiac Chronotropy,Cardiac Chronotropism,Cardiac Rates,Chronotropy, Cardiac,Control, Heart Rate,Heart Rates,Heartbeats,Pulse Rates,Rate Control, Heart,Rate, Cardiac,Rate, Heart,Rate, Pulse
D006439	Hemodynamics	The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.	Hemodynamic
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor
D016276	Ventricular Function	The hemodynamic and electrophysiological action of the HEART VENTRICLES.	Function, Ventricular,Functions, Ventricular,Ventricular Functions