7 results
Antiarrhythmics - Vaughan Williams Classification
Class I (Ia, Ib, Ic) - Na+ Channel Blockade
 • Slows depolarization
Vaughan Williams Classification ... Ib, Ic) - Na+ Channel ... Class III - K+ Channel ... VaughanWilliams #Classification ... #Classes #cardiology
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Vaughan Williams Classification ... ++ influx into cells ... inotropy) ACCP Cardiology ... #Classes #pathophysiology ... #cardiology
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
increases out of cells ... Vaughan Williams Classification ... ++ influx into cells ... inotropy) ACCP Cardiology ... #phases #cardiology
Intraoperative  Bradycardia - Guidelines for Crises in Anaesthesia
Bradycardia in theatre should not be treated as
problem (Box C). ❽ Call ... Consider known drug causes ... digoxin; calcium channel ... myocardial infarction, hyperkalaemia ... Management #Workup #Cardiology
Causes of ST Segment Elevation - Differential Diagnosis Framework

STEMI:
 • Upsloping convex STE: "Pardee's sign" +
Causes of ST Segment ... voltage Other Causes ... dissection • Sodium-channel ... differential #diagnosis #cardiology ... #ecg #ekg #electrocardiogram
Summary of Oncologic Emergencies

Neutropenic fever:
- Fever + ANC < 500 → start cefepime ± vancomycin (if
Treat underlying cause ... interventional radiology ... “big & sticky” cells ... plasmapheresis Hypercalcemia ... ± tocilizumab; call
Peripartum Cardiomyopathy (PPCM)

What is PPCM?
• A form of acute systolic heart failure that develops late in
vessels, harms heart cells ... including giant-cell ... tachycardia on the electrocardiogram ... neurohormonal changes ... Cardiomyopathy #Cardiology