Flashcards in Exam 1 Deck (614)
What do diuretics do?
What do Beta-Blockers do?
Limit sympathetic stimulation to heart, hold heart rate down
What agents increase cardiac muscle contraction?
How do digitalis (glycosides) work?
1. inhibit NA/K pump, increase intracellular Ca++
2. Increases cardiac outpu
3. Low therapeutic window
4. Signs of digitalis toxicity (N/V, headache, confusion, arrhythmias, sinus bradycardia)
(** recently fallen out of favor)
Name 2 other treatments to adjust cardiac muscle contraction?
1. ventricular assist
2. heart transplant
Most clinical measures of cardiac function correlate ______ with clinical severity of HF
EX intolerance in CHF depends on 3 variables:
2. Level of inactivity
Measurements of EX capacity in HF include:
1. peak oxygen uptake
2. anaerobic threshold
6 MWT predicts?
For the 6 MWT, 40% who walke
Acute CARDIAC responses to EX in pts w/ HF = progressive _______ in cardiac output, stroke volume, and HR reserve capacity. EX tolerance is limited by reduced __________________________.
CO during EX.
Acute CIRCULATORY responses to EX in pts w/ HF: muscle blood flow is ________ during an acute bout of EX in pts with HF.
Not entirely due to a reduction in _____________ or ________________. Change in the distribution of _____________ during EX.
-CO or local vascular impairment