Lab 4: Graded exercise test Flashcards
What does graded exercise testing measure?
maximal VO2 and indication of cardiovascular disease
what are the indications of cardiovascular disease during graded exercise testing?
if SBP doesn’t increase or drop
what cause the hypertensive response?
SBP exceeds 20mmHg per 3.5 ml O2/kg/min
What is mean arterial pressure? Value during rest/ exercise?
the average blood pressure at each cardiac cycle
1/3 (SBP-DBP) + DBP
1/2 (SBP-DBP)+DBP
How does SBP increase during exercise?
increase linearly with exercise intensity ( 10mmHg for each 3.5 ml O2/kg/min)
What is double product (rate pressure product)?
(HRxSBP)/100 - indirect reflection of myocardial oxygen requirement (power output of heart)
Factors of VO2 max
if the increased consumed oxygen nor more than 150mmHg at succeeding power
RER>1.15, RPE>17
blood lactate concentration is >= 8mmHg
HR max
What is RER?
rate exchange ration - the ratio of glucose oxidation divide by fatty acid oxidation ( VCO2/VO2 at whole body level)
What is RQ?
ratio of VCO2 (produced)/ VO2(consumed) at cellular level
What is RPE?
rate of perceived exertion - measurement of perception of effort of exercise
Scale of RPE?
0-10 if variable linearly increase with VO2 (lactate)
6-20 for variables increase linearly with VO2 (heart rate)
What does RER>1 indicate?
the disproportionate increase in VCO2 produced than VO2 consumed. Anaerobic metabolism
SBP? DBP?
the 1st sound bolus of blood escaping from the peak pressure coinciding with systole
the disappearance sound indicate streamline blood flow coinciding with diastole
What is the device to measure BP?
sphygmonamometer
Precordial Placement to measure ECG
V1 - 4th rib intercostal space, right sternal
V2- _________, left sternal
V4 - 5th __________, left midclavicular line
V3 midway btwn V2 and V4
V5 - left mid axillary line
V6 - anterior axillary line
