CV and Perfusion

Match Following

Groups:

(a) P waves

,

(b) PR interval

,

(c) QRS Complex

,

(d) ST Segment

• represents the duration between ventricular depolarization and repolarization.

• ECG interpretation measurement used to determine length of ventricular depolarization.

• ECG interpretation measurement of time between atrial and ventricular depolarization.

• ECG interpretation that represents the occurrence of atrial depolarization

Match Following

Groups:

(a) QT interval

,

(b) T waves

,

(c) QRS Complex

,

(d) ST Segment

• measurement used to determine the length of ventricular depolarization and repolarization.

• ECG interpretation measurement used to determine length of ventricular depolarization.

• represents repolarization of the ventricles.

• represents the duration between ventricular depolarization and repolarization.

Reorder the following steps for ECG Analysis

• Measure duration of QRS complex.

  Assess ST segment

• 1. Determine if heart rhythm is regular.

• 1. Assess for P waves.

     1. Measure PR interval.

• 1. Calculate heart rate.

• Observe for changes in T wave.

  Measure length of QT interval.

Heart rhythms can be regular or irregular.

Measurement of the ___ to ___ intervals are used to determine ventricular rhythm, and the ___ to ___ intervals are measured to identify the atrial rhythm.

It is essential to determine if there is one ___ ___ present before each QRS complex and that the shape of the ___ ___ is consistent throughout the ECG strip. If irregular, it indicates that there is a disturbance in electrical conduction between the atria and ventricles and a cardiac dysrhythmia is occurring.

Measurement of the PR interval is calculated from the beginning of the ___ ___ to the beginning of the ___ ___. The length of the PR interval should be consistent, and the normal duration is 0.12 to 0.20 seconds.

The ___ ___ cannot be measured if there are no P waves, if there is more than one identifiable P wave, or if the P wave occurs after the QRS complex.

• Normal Criteria for ECG Analysis

• Heart rate: 60 to 100/min

• Rhythm: Regular

• P-waves: One P wave for every ___ ___

• PR interval: ___ to ___ seconds

• QRS complex: ___ to ___ seconds

• ST segment: No elevations or inversions

• QT interval: < ___ seconds

Sinus bradycardia occurs when the SA node sends an electrical impulse slower than ___ bpm.

The ECG criteria for sinus bradycardia remains the same as what is expected to be identified during NSR. This condition is typically caused by reduced electrical impulses transmitted through the AV node.

Beta blockers are known to cause ___________.