Cardio Hirshfeld 2
Terms in this set (30)
Define oxygen delivery (is it the amount of O2 transferred to tissues?)
What is the normal extraction fraction?
What is the first response when O2 delivery is insufficient for tissue metabolic requirements?
What is the
indicator dilution techique
used to measure?
What percent of O2 transport capacity is actually utilized?
This parameter is "a measure of the adequacy of cardiac output to meet metabolic requirements"
How is diastolic filling affected by increasing HR?
What are the limitations to "whipping" the heart (increasing CO)
What is the principal determinant of CO?
If you artificially increase HR, will CO change?
"_________ provides the
that drives systemic blood flow to all systemic tissues"
This is defined as athe difference between systolic and diastolic pressure
What is a wood unit?
Where is the neural control center for circulatory system control?
These are the afferent nerves for arterial baroreceptors
Describe the structure and mechanism of
How do arterial baroreceptors respond to
increases in arterial pressure?
What induces the release of
atrial natriuretic peptide
What effect does triggering of
receptors have on HR?
What effect does muscarinic receptor activation have on 1) refractoriness and 2) conduction velocity of the
"__________ is the principal determinant of local vascular resistance"
Activation of these receptors causes
of the renal, mesenteric, and cutaneous vasculature
What are the actions of the natriuretic peptides?
Describe the effects of adrenergic/muscarinic stimulation on venomotor tone
What vessels constitute the majority of systemic vascular resistance?
What is the resting membrane potential of vascular smooth muscle cells?
Describe systemic arterial pressure and CO in the context of
A patient is in shock. The first thing to do is to restore systemic arterial pressure. This is what you ask next