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cardiology diagnosis differential pathophysiology tachycardia arrhythmias ekg management syncope antiarrhythmics avnrt bradycardia classes classification clinical conduction ecg pharmacology svt anatomical
Stimulated SA node AV node - Un-stimulated #PQ (mV) 0 ECG (lead II) QRS #QRS #SA node #AV node #Bundle of His Bundle branches #Purkinje fibers #QRS #ST
Stimulated SA node ... AV node - Un-stimulated ... #PQ (mV) 0 ECG ... ) QRS #QRS #SA ... node #AV node
Supraventricular Tachycardias - Pathophysiology Conduction pathways through SA Node, Atrium, AV Node, Bundle of His, and Ventricle
Pathophysiology Conduction pathways ... through SA Node ... , Atrium, AV Node ... Tachycardia • AV ... cardiology #conduction #pathways
Cardiac conducting system - Sinoatrial (SA) node normally generates the action potential, i.e. the electrical
- Sinoatrial (SA ... - The SA node ... through internodal pathways ... atrioventricular (AV ... - From the AV
Anatomical Differential Diagnosis for Arrhythmias • SA node: Sinus bradycardia, Sick Sinus Syndrome (SSS) • AV
Arrhythmias • SA ... Syndrome (SSS) • AV ... > 100 bpm) • SA ... node: AV re-entrant ... Differential #Diagnosis #Causes
Approach to ECGs - Tachy/Bradyarrhythmias Tachyarrhythmias - HR > 100 Wide (1) VT - DANGER (2)
tachy not from SA ... /brady) (3) SA ... escaped beats (4) SA ... rhythms (5) AV ... 200ms from longer pause
Arrhythmias - Differential Diagnosis Algorithm Bradyarrhythmia (<60 bpm) • Sinus Bradycardia • Sick Sinus Syndrome • SA
Differential Diagnosis Algorithm ... Sinus Syndrome • SA ... Block • AV Block ... with Variable AV ... #causes
Syncope - Differential Diagnosis Algorithm Neurocardiogenic: • Vasovagal • Orthostatic Hypotension • Autonomic Neuropathy • Situational (micturition,
Differential Diagnosis Algorithm ... Sinus Syndrome (SA ... 2nd/3rd degree AV ... Differential #Diagnosis #Algorithm ... #causes
Visual Guide to AV Nodal Reentrant Tachycardia (AVNRT) - Pathophysiology - Dual AV nodal physiology is
Visual Guide to AV ... Pathophysiology - Dual AV ... stays inside the AV ... - In most case ... Visualmedapp #AV
Causes of Tachycardia - Differential Diagnosis Algorithm Narrow Complex - Regular: • Sinus tachycardia • Atrial flutter
Causes of Tachycardia ... Differential Diagnosis Algorithm ... Atrial flutter • AV ... tachycardia • AV ... #Causes #cardiology
Arrhythmias - Differential Diagnosis Algorithm May present as: palpitations, dizziness, syncope, chest discomfort Cardiac Causes: - Structural
Differential Diagnosis Algorithm ... • Accessory pathway ... ) Non-Cardiac Causes ... Differential #Diagnosis #Algorithm ... #causes
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