Heart Questions
Which ECG component corresponds to the depolarization of the atria?
P Wave
At which point on an ECG is the first heart sound, "lubb," heard?
QRS complex
Which ECG component corresponds to the depolarization of the ventricles?
QRS complex
Rank the waves in order from amplitude from greatest to least: 1. P Wave 2. T Wave 3. QRS Complex 4. U Wave
QRSS Complex T Wave P Wave U Wave
Baseline
Straight line used as a point of departure for the electrical activity recorded in an ECG.
In which arteries can the pulse be felt?
Superficial arteries
Which ECG component corresponds to the repolarization of the ventricles?
T Wave
According to your results from the pulse rate lab, arteries closest to the heart have a greater pulse intensity. Why do you think this is?
The arteries closest to the heart deal with the greatest amount of pressure directly from the ventricles
Why did the pulse rate decrease 5 minutes after exercise?
The tissue demand for oxygen had decreased.
Select all of the following represented by the number of pulses per minute
heart rate, number of ventricular contraction, number of cardiac cycles
After contracting, the heart relaxes. This happens because of an electrical change called
repolarization
The first heart sound, "lubb," is heard when the AV valves close, and this is related to the _________ on an ECG.
the AV valves close, and this is related to the QRS complex on an ECG.
The ventricles relax leading to
the second heart sound.
The second heart sound, "dupp," is heard when
the semilunar valves close, and this is related to the end of the T wave on an ECG.
When the heart contracts, this is due to an electrical change called
Depolarization
At which point on an ECG is the second heart sound, "dupp," heard?
End of T wave
The _____ rate can be determined by counting the number of QRS complexes on the ECG during one minute.
Heart
A segment of an ECG is
a straight line between two waves.
What does an ECG measure?
all electrical impulses
Pulse is the expansion and recoil of the ____________ walls due to
arterial ; The column of blood ejected by the heart and is passively produced by the pressure changes during systole and diastole.
