CRAT Exam
2 types of v-tach - correct answer-monomorphic (all the same) and polymorphic (looks like a
spindle)
A ____ pause follows a PAC. - correct answer-incomplete. SA node resets its rhythm.
A ____ pause follows a PVC. - correct answer-complete. Before and after premature beat is
the same as 2 r-r intervals
A 3rd degree block will either be ______ with a narrow QRS or _____ with a wide QRS. -
correct answer-Junctional or ventricular. And PR interval has no consistency.
Agonal rhythm - correct answer-IVR with HR < 20 bpm
Although about 70% of ventricular filling occurs passively, ______ ______ contributes an
additional 10% to 30% of blood flow to ventricular filling. - correct answer-atrial kick
An increase in Potassium or decrease in Calcium cause the heart to be ____. - correct
answer-flaccid, limp, dilated, lower HR
Another term for ventricular escape rhythm - correct answer-Idioventricular Rhythm (IVR)
Augmented leads - correct answer-(aVR, aVL, aVF) measure positive electrical charges
through a single electrode and a reference point having zero activity.
Blood Pressure- definition - correct answer-force exerted by the blood against the walls of
the arteries as the ventricles contract and relax
Blood pressure- equation - correct answer-(cardiac output) X (peripheral resistance) or you
could put it another way: (HR)(Stroke Volume)(Peripheral Resistance)
Bundle branch block - correct answer-either the left or right ventricles may depolarize late,
creating a wide, notched QRS.
Cardiac output- definition - correct answer-The amount of blood pumped into the aorta each
minute. (units= mL/min)
Compensatory pause - correct answer-sinus node timing is not interrupted, and next sinus
impulse is conducted on time
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