____ is characterized by tachycardia with P waves hidden in the previous T wave, it is not possible to tell where the rhythm originates.

None of the atrial impulses are conducted to the ventricles. One can often see both P waves and QRS complexes, but they have no fixed relationship (AV dissociation).

Select the correct rhythm: #18.pdf 

Represents ventricular recovery or repolarization.

Represents ventricular depolarization.

Electrical activity is what is detected on ECG, not the muscular activity.

A digital polysomnography (PSG) recording viewed in a ___ second window corresponds to a traditional ink pen recording at a paper speed of ___ mm/sec.

A pattern of AV block in which there are varying PR intervals. Usually, there is progressive prolongation of the PR interval until a P wave is not conducted.

An EKG rhythm in which all parameters are normal except the rate is less than 40 beats per minute in ages 6 through adult.

Dominant or primary pacemaker of the heart.