Heart physiology and ECG UPDATED
ACTUAL Exam Questions and CORRECT
Answers
The AV valves close in response to the - CORRECT ANSWER - contraction of the
ventricles and the resulting rise in ventricular pressure
action potentials received directly from ... stimulate the papillary muscles to contract, allowing
for the proper ... of the AV valves - CORRECT ANSWER - purkinje fibers, closing
mitral valve prolapse severe enough to cause regurgitation may directly cause ... pressure in the
... atrium - CORRECT ANSWER - increased, left
the semilunar valves remain open throughout the ... phase of the cardiac cycle - CORRECT
ANSWER - late ventricular systole
the atria remain in diastole throughout both the ... phases of the cardiac cycle - CORRECT
ANSWER - ventricular systole and ventricular diastole
positive inotropes allow the heart to pump ... blood with fewer heart beats. they do this by ... the
end-systolic volume (ESV) - CORRECT ANSWER - more, decreasing
an individual with high blood pressure (hypertension) is expected to benefit from the
administration of ... inotropic drugs that ... the hearts workload - CORRECT ANSWER -
negative, decrease
the expected effect of the drug Digoxin is to ... ventricular contraction and ... stroke volume -
CORRECT ANSWER - strengthen, increase
a first degree block is caused by - CORRECT ANSWER - delay of the action potential
between the SA and AV nodes
, the rate of ventricular conduction is best determined by the ... on an ECG - CORRECT
ANSWER - number of QRS complexes present within a specific unit of time
an ECG tracing from someone with a third-degree AV block is best described as tracing with a -
CORRECT ANSWER - 2:1 ratio of P waves to QRS complexes
a recording of electrical changes occurring in the myocardium during a cardiac cycle -
CORRECT ANSWER - electrocardiogram
the P wave corresponds to the depolarization of the muscle fibers of the ... - CORRECT
ANSWER - atria
the QRS complex corresponds to the depolarization of the muscle fibers of the ... - CORRECT
ANSWER - ventricles
the T wave corresponds to the ... of the muscle fibers of the ventricles - CORRECT
ANSWER - repolarization
the depolarization of ventricular fibers is indicated by the ... of an ECG - CORRECT
ANSWER - QRS complex
t/f: the P wave of an ECG occurs during the repolarization of the atria - CORRECT
ANSWER - false
the R-R interval correlates with ... - CORRECT ANSWER - one cardiac cycle to the next
successive cardiac cycle
einthoven's triangle is formed by ... - CORRECT ANSWER - 3 electrodes placed on the
skin of the subject
ACTUAL Exam Questions and CORRECT
Answers
The AV valves close in response to the - CORRECT ANSWER - contraction of the
ventricles and the resulting rise in ventricular pressure
action potentials received directly from ... stimulate the papillary muscles to contract, allowing
for the proper ... of the AV valves - CORRECT ANSWER - purkinje fibers, closing
mitral valve prolapse severe enough to cause regurgitation may directly cause ... pressure in the
... atrium - CORRECT ANSWER - increased, left
the semilunar valves remain open throughout the ... phase of the cardiac cycle - CORRECT
ANSWER - late ventricular systole
the atria remain in diastole throughout both the ... phases of the cardiac cycle - CORRECT
ANSWER - ventricular systole and ventricular diastole
positive inotropes allow the heart to pump ... blood with fewer heart beats. they do this by ... the
end-systolic volume (ESV) - CORRECT ANSWER - more, decreasing
an individual with high blood pressure (hypertension) is expected to benefit from the
administration of ... inotropic drugs that ... the hearts workload - CORRECT ANSWER -
negative, decrease
the expected effect of the drug Digoxin is to ... ventricular contraction and ... stroke volume -
CORRECT ANSWER - strengthen, increase
a first degree block is caused by - CORRECT ANSWER - delay of the action potential
between the SA and AV nodes
, the rate of ventricular conduction is best determined by the ... on an ECG - CORRECT
ANSWER - number of QRS complexes present within a specific unit of time
an ECG tracing from someone with a third-degree AV block is best described as tracing with a -
CORRECT ANSWER - 2:1 ratio of P waves to QRS complexes
a recording of electrical changes occurring in the myocardium during a cardiac cycle -
CORRECT ANSWER - electrocardiogram
the P wave corresponds to the depolarization of the muscle fibers of the ... - CORRECT
ANSWER - atria
the QRS complex corresponds to the depolarization of the muscle fibers of the ... - CORRECT
ANSWER - ventricles
the T wave corresponds to the ... of the muscle fibers of the ventricles - CORRECT
ANSWER - repolarization
the depolarization of ventricular fibers is indicated by the ... of an ECG - CORRECT
ANSWER - QRS complex
t/f: the P wave of an ECG occurs during the repolarization of the atria - CORRECT
ANSWER - false
the R-R interval correlates with ... - CORRECT ANSWER - one cardiac cycle to the next
successive cardiac cycle
einthoven's triangle is formed by ... - CORRECT ANSWER - 3 electrodes placed on the
skin of the subject
