Cardiac Arrythmias

Question 1

Where are latent pacemakers located?

Answer 1

Atrial

AV junctional

Ventricular

Question 2

The ________ occurs when an area of the heart is not reached by the normal stimulus triggered at the sinus node.

Answer 2

Escape

Question 3

__________ occur as rhythms superimposed actively on the sinus rhytm, because an ectopic focus begins generating action potentials at a rate higher than that of the sinus node.

Answer 3

Ectopic tachycardias

*The interval between the last normal beat and the first ectopic beat is always shorter than the normal nasic interval

Question 4

In atrial flutter and fibrillation there is a __________ AV block, where the AV can not conduct all the action potential coming from the atria at a very high frequency.

Answer 4

Second degree

Question 5

Atrial fibrillation

Answer 5

A chaotic activation of the atrial muscle where small areas of the atria are activated at different times by multiple ectopic foci

Question 6

AV junctional ectopic arrythmias

Answer 6

The activation of the atria and ventricles occurs almost instantaneously. The QRS complex may mask the P wave

Question 7

Ventricular ectopic arrythmias

Answer 7

QRS and T waves are abnormal because the activation of the ventricle follow the normal pathway

Question 8

_____________ is with ventricular arrest the most severe arrythmia.

Answer 8

Ventricular fibrillation

*There is chaotic activation of ventricles at different times by multiple ectopic foci, so that it is impossible to recognize any QRS complex