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23 Cards in this Set

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1. What 4 factors determine cardiac performance?
Preload, Afterload, Contractility, HR.
EACH affects *Q
2. Differentiate between the term chronotropic and ionotropic.
Ionotropic-affects contractility(IE. B-blocker), Chronotropic-Time (Rate) motion.
3. Which of the following represent myocardial oxygen consumption (indirectly)? Q, RPP, SV, EDV, or Vo2?
RPP. Also called double product is the prevalent measure of MO2 -RPP.
(HR X Systolic BP)
4. What influence does SV have on contractility? What influence does coronary circulation have on contractility?
Coronary circulation increases contractility
5. What influence does an increased afterload have on performance?
Decrease
5b. What type of exercise (endurance training or strength resistance training) has an increased afterload?
Strength training
5c. What influence does this type of each type of training have on the heart structure?
Different type of heart muscle hypertrophy. Both > Vent. Wall muscle. ST (afterload pressure)> Ventricular mass (concentric or layered myfibrils) & hypertrophy. Endurance training(Flow)Series or lengthening myfibrils>left ventrical dimensions w/ less hypertrophy.
6. What influence does an increased afterload have on MO2?
Increases it. RPP ^ therefore MO2 up^
7. Why are static/dyanamic activities dangerous (e.g. shoveling snow)? What kind of effect does this activity have on HR and BP?
High BP induced very quickly.HR rises quickly. BP & HR highly elevated
8. What type of effect does an increased myocardial stretch have (preload) on SV?
Increases SV
9. What influence does working out at extremely high temperatures (thus sweating) have on preload (and overall exercise performance)?
Lowers blood volume, ergo reduces SV and performance. (Therefore < Q)
10. How does muscle help venous return?
Muscle contraction "pumps" venous blood back toward heart. (Constriction)
11. What effect does endurance exercise training have on the following:(See following 8 cards).
See following
What effect does endurance exercise training have on: Resting HR
Reduced
What effect does endurance exercise training have on: Parasympathetic activity at rest
improved-better relaxation
What effect does endurance exercise training have on: Sympathetic activity at rest
Less
What effect does endurance exercise training have on: Resting SV ?
increased (ergo lower HR)
What effect does endurance exercise training have on: Contractility during exercise
improved
What effect does endurance exercise training have on: Ventricular compliance during exrercise
increased
What effect does endurance exercise training have on: Blood volume
increase as much as a litre
What effect does endurance exercise training have on: Hematocrit
actually goes down as a % due to increased blood volume. improved platelets
12. How do we calculate Rate Pressure Product?
RPP= HR X systolic BP
13. Identify Frank Starling Mechanism
Relationship between Myocardial stretch and SV is Frank-Starling Mechanism.( As much as 120% improvement from F-S M).