Cardiovascular Review Questions Flashcards
True or False
Resting heart rate of an endurance trained person is usually lower than that of an unfit person.
True
True or False
Resting stroke volume is approximately the same in untrained and trained persons.
False
True or False
Cardiac output is calculated by adding stroke volume and heart rate
False
True or False
Once stroke volume reaches a maximum, any further increase in cardiac output is brought about by increase in heart rate.
True
True or False
The QRS complex of the ECG represents ventricular depolarization
True
True or False
The P-wave of the ECG represents atrial relaxation.
False
True or False
The heart responds to a training stimulus just as any other muscle.
True
True or False
Blood flow to the heart muscle increases by more than 4 fold during maximal work.
True
True or False
Maximal cardiac output and maximal VO2 are linearly related.
True
True or False
1Stroke volume reaches a maximum value at about 50-70% of max VO2
True
True or False
The heart may be considered to be two separate pumps.
True
True or False
The superior and inferior vena cavae return venous blood to the right ventricle.
False
True or False
The pulmonary vein contains oxygenated blood
True
True or False
The aorta contains oxygenated blood
True
True or False
The mitral valve, a bicuspid valve, controls blood flow between the left atrium and left ventricle.
True
True or False
A heart murmur occurs when there is an electrical conduction disturbance in the heart.
False
True or False
The term cardiac cycle refers to the electrical and mechanical events that occur in the heart during the course of a single heartbeat.
True
True or False
The contractile phase of the cardiac cycle is referred to as systole.
True
True or False
The relaxation phase of the cardiac cycle is referred to as diastole.
True
True or False
The PR interval represents the time required for the depolarization wave to pass through both atria.
False
True or False
The R to R interval represents one complete cardiac cycle
True
True or False
Normal heart sounds are a result of the vibrations of the heart valves as they open.
False (as they close)
True or False
Right ventricular pressure is only about 1/6th as great as left ventricular pressure
True
True or False
Over the course of one minute period, the amount of blood entering the right atrium is equal to the amount of blood ejected from the left ventricle.
True
True or False
The amount of oxygen needed to lift an object of same weight and same height is the same for trained and untrained person
True
If work is the same, then oxygen requirement is the same
True or False
Maximum cardiac output in a well-trained athlete reaches higher values compared with untrained persons during exercise.
True
Because they have higher max VO₂ levels and can take their HR higher. Resting CO is the same between the two.
True or False
It is not unusual to find maximal cardiac outputs in athletes exceeding 25 to 30 liters per minute.
True
True or False
In general, the higher the maximal cardiac output, the higher the aerobic power
True
True or False
The large changes in cardiac output, in response to exercise, are brought about by changes in stroke volume and heart rate
True
True or False
Resting stroke volume for untrained and trained persons is about the same.
False
True or False
At a given exercise intensity, heart rate is relatively slower in a trained subject than an untrained subject.
True
True or False
An increase in the a-vo2 difference during exercise means that a larger percentage of the available oxygen is being extracted from blood as it passes through the muscle beds
True
True or False
Training enhances the maximal a-vo2 difference.
True
True or False
Resistance to blood flow decreases during heavy exercise.
True
