CARDIAC DYSRHYTHMIAS LECTURE - BASICS & SINUS RHYTHM | NLE & NCLEX

Introduction to Cardiac Dysrhythmias00:00:00

Overview of cardiac dysrhythmias, defining them as irregular heart rhythms that cause hemodynamic instability, and outlining the lecture structure for PNLE and NCLEX preparation.

Understanding the ECG Waveform00:02:26

Detailed breakdown of the PQRST wave: P-wave (atrial depolarization), QRS complex (ventricular depolarization), and T-wave (ventricular repolarization/relaxation).

Anatomy and Conduction System00:06:10

Explanation of the heart's electrical conduction system, highlighting the Sinoatrial (SA) node as the primary pacemaker and how it dictates the heart rate.

Normal Sinus Rhythm00:14:27

Criteria for normal sinus rhythm (60-100 bpm), ECG paper measurements, and the clinical significance of regular, identical waveforms.

Sinus Bradycardia and Management00:19:45

Defining sinus bradycardia (less than 60 bpm), identifying non-pathological causes like sleep or athleticism, and discussing hemodynamic instability management via Atropine and transcutaneous pacing.

Sinus Tachycardia and Management00:35:32

Defining sinus tachycardia (over 100 bpm), discussing triggers like stimulants and decongestants, and outlining management protocols including vagal maneuvers, beta-blockers, and calcium channel blockers.

Cardioversion Basics00:48:38

Explanation of synchronized cardioversion as a last resort, emphasizing the 'basta may R pwedeng i-cardiovert' rule to safely synchronize shocks with the R wave to restart normal rhythm.