EKG Principles : Nursing Course


YOU CAN TAKE THE NURSING CLASS TEST RIGHT AWAY




OR REVIEW THE FOLLOWING NURSING CLASS KNOWLEDGE BLOCKS


The regularity of a heart rhythm is determined by looking at the:

R-R interval

Rationale: The time intervals between consecutive heart beats are measured on an EKG strip by measuring from the beginning of a QRS complex to the beginning of the next QRS complex,known as the R-R interval. When analyzing the regularity of a heart rhythm, it is vital to evaluate the atria and the ventricles. The regularity of the atrials is assessed by looking at the patterns of the P waves, and the ventricles are evaluated by assessing the regularity of the R waves. The intervals from R to R on an EKG strip can determine if a rhythm is regular or irregular. A regular rhythm means that the distance between the beats is the same.


The pacemaker of the heart is the:

sinoatrial node (SA node)

Rationale: The S-A node is a small mass of cardiac muscle tissue that can initiate impulses into the surrounding cardiac muscles and create one impulse after another. This impulse is responsible for the rhythmic contractions of the heart, making it the pacemaker of the heart. The normal rhythm for impulses that originate in the S-A node are 60-100 beats per minute. The sinoatrial (SA) node is located in the upper posterior wall of the right atrium just distal to the opening from the superiorvena cava.


When evaluating an EKG rhythm, any interference that makes the rhythm difficult to interpret is considered:

artifact

Rationale:

A heartbeat that originates in an abnormal place in the heart is an:

ectopic beat

Rationale:

When interpreting an EKG rhythm, the P wave represents:

atrial depolarization

Rationale:

A normal regular rhythm of the heart is:

sinus rhythm

Rationale:

When interpreting an EKG, ventricular depolarization is reflected by the:

QRS interval

Rationale:

Any rhythm that is not normal sinus rhythm is considered a:

dysrhythmia

Rationale:

When determining the name of a cardiac rhythm, the first portion of the name is based on:

the node that the rhythm originated in

Rationale:

When calculating the heart rate for a patient, count the QRS complexes that are present on an EKG strip every:

6 seconds

Rationale:

AND THEN TAKE THE CLASS TEST