263 results
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
- Ventricular Depolarization ... • Atrial depolarization ... and magnitude of depolarization ... phase 4 to slow depolarization ... Classification #Classes
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
and magnitude of depolarization ... phase 4 to slow depolarization ... prolong AV node repolarization ... prolong AV node repolarization ... Classification #Classes
Hyperkalemia shortens repolarization; changes in the T wave provide the earliest clues to hyperpotassemia.
 - At
Hyperkalemia shortens repolarization ... 6.0 mEq/L, rapid repolarization ... causes peaked T ... in conduction causes ... #Progression #Table
Distinguishing Between Benign Early repolarization vs STEMI on EKG
#Diagnosis #Cardiology #ECG #EKG #Repolarization #STEMI #Comparison #Table
Between Benign Early repolarization ... Cardiology #ECG #EKG #Repolarization ... STEMI #Comparison #Table
Pacemaker Operating Modes
1 - Chamber paced
     A (atrium), V (ventricle), D (dual/both)
2
or paced atrial depolarization ... after ventricular depolarization ... to an intrinsic depolarization ... order to initiate depolarization ... #Pacemaker #PPM
Pacemaker Coding Terminology
#Diagnosis #Cardiology #PPM #Pacemaker #LetterCode #Coding #Classification #Table #CoreEM
Diagnosis #Cardiology #PPM ... Classification #Table
Antiarrhythmics - Vaughan Williams Classification
Class I (Ia, Ib, Ic) - Na+ Channel Blockade
 • Slows depolarization
Blockade • Slows depolarization ... Blockade • Slows depolarization ... Blockade • Slows depolarization ... Classification #Classes
Temporary / External Pacing
 • Transvenous & epicardial pacing are temporary methods of supporting brady- &
required to trigger depolarization ... to identify a depolarization ... nickmmark #pacemaker #PPM
REBEL Review 89: Treatment of Postpartum Hemorrhage #FOAMed #table #obstetrics #hemorrhage #PPH
Hemorrhage #FOAMed #table ... obstetrics #hemorrhage #PPH
Hypotension - Guidelines for Crises in Anaesthesia

Hypotension is commonly due to unnecessarily deep anaesthesia, the autonomic
hypovolaemia or combined causes ... pressure as a cause ... heart rate <60 bpm ... heart rate >100 bpm ... heart rate >100 bpm