Test Flashcards
Hr recovery
Comparison of peak hr and recovery hr 1-2 min into recovery
Chronotropic incompetence
An attenuated hr response to exercise
85% of max
B blocker 62% of max
Sign of possible CAD
Abnormal hr recovery
Decrease <22 at 2 min supine
Exertional hypotension
SBp drop > 10 mm hg despite increase in work load
Max O2 uptake healthy adult
30-45 ml kg min
Peak vo 2 cad
13-25 ml kg min men
10-18 ml kg min women
Factors effecting vo2
⬇️ cardiac output ( may be ⬇️ due chronotropic incompetence or LV disfunction secondary to prior MI, ischemia, cardiomyopathy
⬇️ peak bld flow peripheral muscle
Peripheral skeletal muscle cellular abnormalities
Result of cardio myopathy
⬇️ EF
⬇️ stroke volume
Ischemic cascade
- Imbalance between myocardial oxygen supply and demand
- Ischemic event causing cellular abnormalities
- Abnormalities in diastolic function ( reduced vent compliance and impaired filling
- Abnormalities in systolic function
- ECG changes like ST depression
- Angina
Rate pressure product
Myocardial O2 demand
HRxSBP
Variables determining myocardial 02 demand
HR
LV pre load
Myocardial contractility
Four pathogenic factors that affect myocardial 02 demand
- Coronary artery stenosis w endothelial dysfunction
- Microvascular dysfunction
- Abnormalities of the autonomic nervous system
- Abnormalities of coagulation and fibrinolytic systems
CAD exercise intensity
40-80% hrr 1500-2000 kcal expenditure
Angina exercise intensity
40-80% hrr or 10 beats below ischemic threshold
Initial cardiac exrx
5-10 min warm up cool down including stretching rom low intensity aerobic activity
Progressing to 30-60 min aerobic exercise as tolerated
40-80% hrr or 10 beats below ischemic threshold or defibrillation threshold
RPE 11-14
Resistance training 50-60/80% 1 RM
8-10 or 10-15 reps 1set 2-3 days
RPE 11-14