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Bradycardias Comparison Table
 - SINUS BRADYCARDIA 
 - JUNCTIONAL BRADYCARDIA 
 - 1st DEGREE AV BLOCK
Bradycardias Comparison ... HEART BLOCK #Diagnosis ... #Cardiology #EKG ... #ECG #Bradycardia ... #Table
Approach to ECGs - Tachy/Bradyarrhythmias
Tachyarrhythmias - HR > 100
Wide
  (1) VT - DANGER
  (2)
Approach to ECGs ... block (3) Multifocal ... (2) Sick Sinus Syndrome ... bradyarrhythmia #ECG ... #EKG #diagnosis
EKG Interpretation Cheat Sheet
1) Rate 
 - Regular - Count-Off 
 - Irregular - Count number
EKG Interpretation ... junction origin (e.g ... within the atria (e.g ... @AmyChung #EKG ... Interpretation #ECG
Shock - Differential Diagnosis by Classification
Reflex Syncope 
 - Vasovagal syncope
   • Prolonged standing
Bradyarrhythmias • Sinus bradycardia ... Medication side effect (e.g ... Subclavian steal syndrome ... Medication side effect (e.g ... Classification #Table
Muscarinic Receptor Agonists and Antagonists 
Muscarinic Receptor Agonists
Methacholine
 • Diagnosis of bronchial airway
Carbachol
 • Glaucorna (topical
Methacholine • Diagnosis ... due to Sjögren syndrome ... Acute symptomatic bradycardia ... (e.g., AV block ... #Pharmacology #Table
Urine Microscopy Crystals
Uric Acid crystals:
 - Formation promoted by acidic urine
 - Seen in tumor lysis
in tumor lysis syndrome ... urease-producing organisms (e.g ... acidic urine - Diagnostic ... Microscopy #Crystals #comparison ... #table #urinalysis
Palpitations - Differential Diagnosis Framework

What?
• It is an unpleasant awareness or sensation that the heart is
- Differential Diagnosis ... Palpitations Diagnosis ... exam • 12-lead ECG ... • Multifocal atrial ... Valvular disease (e.g
Hyperkalemia - Diagnosis and Management - GrepMed Handbook

S/Sx: Most pts asymptomatic. Weakness, cramping, nausea, paresthesias, palpitations,
Hyperkalemia - Diagnosis ... palpitations, bradycardia ... heparinized tube) • ECG ... test (only if no clear ... Elimination (see Table
Hyperthermic Toxidromes
Five toxidromes may present with overlapping features: hyperthermia, rhabdomyolysis, altered mental status/seizures.
 • Sympathomimetic -
• Serotonin Syndrome ... dopamine blockers (e.g ... dopamine agonists (e.g ... Hyperthermic #Toxidromes #comparison ... #table #diagnosis