149 results
Pacemaker Placement Indications
Class I:
 • Third degree block
 • Advanced 2nd degree block
 • Symptomatic Mobitz
I or II • Mobitz ... Class II: • Mobitz ... LBBB with syncope Class ... arrest, prolonged PR ... • Reversible causes
Summary of Heart Blocks
1st Degree Heart Block:
 • Prolonged PR >200ms (5 small squares).
 • Narrow
Summary of Heart Blocks ... • Prolonged PR ... Treatment 2nd Degree, Mobitz ... . 2nd Degree, Mobitz ... HeartBlocks #Types #Classification
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Vaughan Williams Classification ... depolarization • ↑ PR ... K+ channels (primarily ... velocity) - ↑ PR ... #Classes #pathophysiology
Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary
First Degree AV Block
 • The P wave is
PR interval ... Type I aka Mobitz ... type II (aka Mobitz ... There is constant PR ... electrocardiogram #classification
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
1º - long PR intervals ... 200ms from longer pause ... 2º - Mobitz I ... successively longer PR ... II / Mobitz - ,
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
Vaughan Williams Classification ... depolarization • ↑ PR ... K+ channels (primarily ... velocity) - ↑ PR ... #Classes #pathophysiology
Antiarrhythmics - Vaughan Williams Classification
Class I (Ia, Ib, Ic) - Na+ Channel Blockade
 • Slows depolarization
Vaughan Williams Classification ... rate and prolongs PR ... rate and prolongs PR ... VaughanWilliams #Classification ... #Classes #cardiology
Hyperparathyroidism classification
Different causes and features of hyperparathyroidism - raised parathormone (PTH).

#Diagnosis #Hyperparathyroidism #Differential #Primary #Secondary #Tertiary
Hyperparathyroidism classification ... Different causes ... #Differential #Primary ... Comparison #Table #Classification
Causes of Primary and Secondary (without Red Flags) Headaches - Differential Diagnosis Algorithm

#Primary #Secondary #Headaches #Neurology
Causes of Primary ... Differential Diagnosis Algorithm ... #Primary #Secondary ... Differential #Diagnosis #Algorithm ... #Causes
Nail Disorders - Primary and Systemic Causes - Differential Diagnosis Algorithm

#NailDisorders #Primary #Secondary #Systemic #dermatology #Differential
Nail Disorders - Primary ... and Systemic Causes ... Differential Diagnosis Algorithm ... NailDisorders #Primary ... #causes