Cardiac Rhythms and Dysrhythmias Part 2 Questions and Answers 100% Accuracy

Cardiac Rhythms and Dysrhythmias

Part 2 Questions and Answers 100%

Accuracy



Third Degree Heart Block

Occurs when atrial impulses are completely blocked at the

AV node and fail to reach the ventricle; atria and ventricles

are controlled by different and independent pacemakers

Third Degree Heart Block Causes

inferior or anteroseptal MI

Third Degree Heart Block Clinical Manifestations

dizziness, syncope, fatigue, exercise intolerance, HF

Third Degree Heart Block ECG Rate

, atrial 60-100 bpm; ventricular 15-60 bpm

Third Degree Heart Block ECG P:QRS

no relation between P waves and QRS complexes;

independent rhythms

Third Degree Heart Block Nursing Management

immediate pacemaker therapy

Ventricular Fibrillation

Extremely rapid, chaotic ventricular depolarization; heart

does not pump

Ventricular Fibrillation Death

death will follow within 4 minutes if the rhythm is not

recognized and terminated and an effective perfusing

rhythm reestablished

Ventricular Fibrillation Causes

severe myocardial ischemia or infarction; digitalis toxicity;

hypothermia; hypo and hyperkalemia; metabolic acidosis