Lab 4: Acute Responses to Aerobic Exercise Flashcards
Blood Pressure
Amount of pressure exerted by circulating blood on the walls of the arteries
-BP = Q * TPR
Cardiac Output (Q)
-Total volume of blood pumped by the left ventricle per minute
-Product of heart rate and stroke volume
Total peripheral resistance
-Cumulative resistance of thousands of arterioles in the body
-Determined by the degree of vasoconstriction/vasodilation and compliance/stiffness
Systolic BP
Force exerted on arteries during systole (Contraction)
Diastolic BP
Force exerted on arteries during diastole (Relaxation)
Why ix BP measured
-Highly regulated
-Maintenance of BP is important to protect vessels and organs they perfuse
-Abnormal measurements above or below normal ranges can be pathological
Pulse pressure
Difference between systolic and diastolic pressure
-Vascular compliance of aorta
-PP=SBP-DBP
Mean arterial pressure
Average blood pressure during single cardiac phase
-Can indicate perfusion of tissues with blood
-MAP=(PP/3)+DBP
Rate pressure product
Stress put on the heart from contraction
-Indicates myocardial oxygen requirement & power output of the heart
-RPP=SBP*HR
Blood Pressure in the U.S
-1 out of every 2 adults has hypertension
-1 in 4 with hypertension have it under control
-About half of those with uncontrolled hypertension have BP over 140/90
-Hypertension costs the nation 131 billion each year
-1400 deaths per day
Hypertension increases your risk of…
-First heart attack
-First stroke
-Chronic heart failure
Tachycardia
Above 100 BPM
Bradycardia
Below 60 BPM
Resting heart rate (RHR)
60-100 BPM on average
Normal Blood Pressure
Systolic: Less than 120
AND
Diastolic: Less than 80
Hypertensive Crisis
Systolic: 180+
AND/OR
Diastolic: 120+
Elevated Blood Pressure
Systolic: 120-129
AND
Diastolic: Less than 80
High Blood Pressure Stage 2
Systolic: 140+
or
Diastolic: 90+
High Blood Pressure Stage 1
Systolic: 130-139
OR
Diastolic: 80-89
