An ECG rhythm strip shows a ventricular rate of 46 bpm, a regular rhythm, a PR interval of 0.14 ...

The answer to question 1  B
The rhythm described fits the ECG criteria for a sinus bradycardia.

The answer to question 2  F
Leads V4R, V5R, and V6R view the right ventricle. The leads corresponding to the posterior wall of the left ventricle are V7, V8, and V9.

The answer to question 3  D
The rate of sinus tachycardia is between 101 and 180 beats/min.

The answer to question 4  T
If a delay or block occurs in one of the bundle branches, the ventricles will not be depolarized at the same time. The electrical impulse travels first down the unblocked branch and stimulates that ventricle. Because of the block, the impulse must then travel from cell to cell through the myocardium, rather than through the normal conduction pathway, to stimulate the other ventricle. The ventricle with the blocked bundle branch is the last to be depolarized.

The answer to question 5  B
Sinus arrhythmia that is associated with the phases of breathing and changes in intrathoracic pressure is called respiratory sinus arrhythmia. The rhythm is irregular; the heart rate increases gradually during inspiration (R-R intervals shorten) and decreases with expiration (R-R intervals lengthen).

The answer to question 6  T
Cardiac output is the amount of blood pumped into the aorta each minute by the heart. It is defined as the stroke volume multiplied by the heart rate.

The answer to question 7  Second-Degree AV Block Type I Third-Degree AV Block
Ventricular
Rhythm Irregular Regular
PR Interval Inconstant; generally progressive None
QRS Width Usually narrow Narrow or wide

I know you spent a lot of time finding this because I swear it wasn't in my textbook

You're partially right, it's found midway in the chapter, but not at all easy to find. Good luck with the rest