11 results
Antiarrhythmic Medications - Vaughan Williams Classification - Summary Table
Class I agents - Sodium Channel Blockers⠀
Class II
Vaughan Williams Classification ... - Summary Table ... III agents - Potassium ... #Medications #Classification ... #Summary #Table
Hyperkalemia shortens repolarization; changes in the T wave provide the earliest clues to hyperpotassemia.
 - At
Hyperkalemia shortens ... repolarization; changes ... repolarization causes ... in conduction causes ... #Progression #Table
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Vaughan Williams Classification ... Channel Blockers ... 3 - Potassium Channel ... #Pharmacology #Classification ... #Classes #pathophysiology
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
- Anorexia GI Losses ... Ureterosigmoidostomy Urinary Losses ... Diagnosis #Low #Potassium ... #Table #Classification ... #Causes
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
Vaughan Williams Classification ... : CLASS 1 - Sodium ... 3 - Potassium Channel ... #Pharmacology #Classification ... #Classes #pathophysiology
Hepatic Encephalopathy - Diagnosis and Management Summary
Definition:
 • Alteration in brain function manifested by neuropsychiatric symptoms
rule out other causes ... Altered sleep, Shortened ... apathy, Personality change ... can be used in cases ... Encephalopathy #Grading #Classification
DEPRESSED ST Mnemonic for Causes of ST Segment Depression

D - Drooping valve (mitral valve prolapse)
E -
DEPRESSED ST Mnemonic ... for Causes of ST ... Enlargement (LV) P - Potassium ... Reciprocal ST changes ... ST #Depression #Mnemonic
Causes of Hypokalemia
I. Decreased intake
   A. Starvation
   B. Clay ingestion
II. Redistribution into
Causes of Hypokalemia ... inhibition of "leak" K* channels ... Diagnosis #Low #Potassium ... #Classification ... #Causes
Causes of Hyperkalemia
l. Pseudohyperkalemia
  A Cellular efflux; thrombocytosis, erythrocytosis, leukocytosis, in vitro hemolysis
  B.
Causes of Hyperkalemia ... similar, positively charged ... Diagnosis #High #Potassium ... #Classification ... #Causes
Evaluation and Management of Hypokalemia

Hypokalemia is often asymptomatic. Evaluation begins with a search for warning signs
palpitations, changes ... Most cases of hypokalemia-induced ... depletion impedes potassium ... Hypokalemia #Evaluation #Algorithm