Cardiac cycle — Flashcards

Flashcard 71: An _____ snap in mitral stenosis signifies more severe disease

Answer: earlier

Extra:  https://onlinemeded.org?ref=anki 

Flashcard 72: Jugular Venous Pulses: tall A wave and tall V wave is seen in _____

Answer: pulmonary hypertension

Extra:  https://onlinemeded.org?ref=anki 

Flashcard 73: During systole, is there relatively constant blood flow in the left ventricle's coronary arteries?_____

Answer: No

Flashcard 74: _____ is the second phase of a cardiac cycle and represents the period between aortic valve opening and closing

Answer: Ventricular (systolic) ejection

Flashcard 75: _____ is the fifth phase of a cardiac cycle and represents the period just before mitral valve closing

Answer: Atrial systole (atrial contraction)

Extra: In a common 5-phase model of the cardiac cycle: 1. Isovolumetric contraction 2. Ventricular ejection 3. Isovolumetric relaxation 4. Ventricular filling (Rapid and Slow/Reduced filling) 5. **Atrial systole**: The final phase of diastole where the atrium contracts to provide the "atrial kick." This phase occurs just before the closure of the AV valves (mitral and tricuspid).

Flashcard 76: In what demographics may the heart sound S3 be normal?_____

Answer: Children, young adults, pregnant women, athletes (4 options)

Flashcard 77: After myosin binds a new ATP molecule in muscle contraction, hydrolysis of the new ATP molecule to ADP allows the myosin head to adopt a _____ position, ready for a new contraction cycle.

Answer: high-energy, "cocked"

Flashcard 78: During rapid ventricular filling, the right atrium empties into the right ventricle, which appears as the _____ descent on the venous pulse curve

Answer: y

Flashcard 79: What effect does decreased heart rate have on cardiac contractility?_____

Answer: Decreased contractility

Flashcard 80: The _____ refractory period refers to the period in which no action potential can be initiated

Answer: absolute