Hemodynamics — Flashcards

Flashcard 51: What effect does standing up or the valsalva maneuver have on the intensity of MR, AR, MS, and AS murmurs? _____

Answer: Decreased intensity

Flashcard 52: Which substance is generated in response to PNS innervation via the pelvic nerve to mediate an erection? _____

Answer: Nitric oxide (NO), which causes increased cGMP

Flashcard 53: How does hematocrit change with isosmotic diarrhea? _____

Answer: Increased

Extra: Other: Goljan

Flashcard 54: _____ pneumothorax may restrict venous return resulting in hypotension and obstructive shock

Answer: Tension

Flashcard 55: What effect does inspiration have on venous return to the right atrium? _____

Answer: Increased venous return

Flashcard 56: In Poiseuille's equation, Resistance is _____ proportional to the viscosity (η) of the blood

Answer: directly

Extra: Poiseuille's equation: Resistance is directly proportional to blood viscosity and vessel length, and inversely proportional to the fourth power of the vessel radius (r^4).

Flashcard 57: In general, leukotrienes cause vaso-_____

Answer: constriction

Flashcard 58: Aggregation is a balance between pro and anti-aggregation factors: Pro-aggregation - _____ blood flow Anti-aggregation - _____ blood flow

Answer: decreased

Flashcard 59: Which liver zone is affected first by ischemia? _____

Answer: Zone III (centrilobular)

Extra: Atlas:

Flashcard 60: The _____ pressure is the difference between the systolic and diastolic pressures

Answer: pulse