10 Questions
The QRS complex represents ______ depolarization.
ventricular
Atrial repolarization also occurs during the ______.
QRS complex
The T-wave is the period of time when the ventricles ______.
repolarize
The size of the T-wave varies from ______ to person.
person
Some people have distinctive T-waves, while others have barely any ______ at all.
T-waves
The R-wave is much larger than the other waves due to the thick ventricle walls and simultaneous ______.
depolarization
The ECG output can be divided into three basic parts: The P-wave represents the ______ depolarization.
atrial
The larger the amplitude of the deflection on the ECG, the larger the number of ______ cells.
depolarized
The same is not true for the QRS complex or P-waves, which are similar in amplitude from ______ to person.
person
The R-wave is much larger than the other waves because the ventricle walls are very thick and the cells all ______ together.
depolarize
Test your knowledge on the pathway of the electrical signal in the cardiac conduction system from the SA node to the ventricles. Learn why the signal travels to the apex of the heart before spreading back up. Analogies related to toothpaste squeezing are also discussed.
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