HerzKreislaufB

HerzKreislaufB is a theoretical framework within cardiovascular physiology that models the interaction between cardiac function and the circulatory system. It aims to capture how cardiac output, systemic vascular resistance, and venous return are regulated to maintain arterial pressure and organ perfusion.

The term is primarily used in German-language educational and research contexts to denote a variant or version of the broader Herz-Kreislauf model. It is not universally standardized and may be used alongside other models such as HerzKreislaufA to illustrate different assumptions about compliance, feedback, or time delays.

Core elements typically included are the heart as a pump with stroke volume and heart rate, the arterial tree with compliance and resistance, the venous system with unstressed and stressed volumes, and regulatory mechanisms such as the baroreceptor reflex, autonomic nervous system input, and hormonal influences like the renin-angiotensin system. The B variant may emphasize dynamic feedback loops and short-term regulation.

Applications include educational demonstrations, computational simulations, and theoretical analyses of hemodynamic responses to perturbations (for example blood loss, exercise, or pharmacological interventions). It is not a clinical diagnostic tool by itself, and parameter values can vary across models. Limitations include simplifications of tissue heterogeneity and nonlinearities.

See also: Cardiovascular system, Cardiac output, Blood pressure, Baroreceptor reflex, Hemodynamics, Cardiovascular physiology. For foundational concepts, consult standard physiology texts or primary literature on cardiovascular modeling.