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cardiology diagnosis ecg ekg differential avblock summary antiarrhythmics arrhythmias atrioventricular blocks bradyarrhythmia bradycardia classes complete degrees elevation heartblocks indications management
Antiarrhythmics - Vaughan Williams Classification Class I (Ia, Ib, Ic) - Na+ Channel Blockade • Slows depolarization
Vaughan Williams Classification ... cells • Slows sinus ... rate and prolongs PR ... cells • Slow sinus ... #Classes #cardiology
Summary of Heart Blocks 1st Degree Heart Block: • Prolonged PR >200ms (5 small squares). • Narrow
• Prolonged PR ... • Prolonged PR ... Treatment: Pacemaker 3rd ... HeartBlocks #Types #Classification ... Diagnosis #EKG #electrocardiogram
Approach to ECGs - Tachy/Bradyarrhythmias Tachyarrhythmias - HR > 100 Wide (1) VT - DANGER (2)
DANGER (2) Sinus ... block 1º - long PR ... 200ms from longer pause ... successively longer PR ... EKG #diagnosis #electrocardiogram
Pacemaker Placement Indications Class I: • Third degree block • Advanced 2nd degree block • Symptomatic Mobitz
induced 2nd or 3rd ... unclear origin • Sinus ... arrest, prolonged PR ... • Reversible causes
Arrhythmias - Differential Diagnosis Algorithm Bradyarrhythmia (<60 bpm) • Sinus Bradycardia • Sick Sinus Syndrome • SA
Differential Diagnosis Algorithm ... (<60 bpm) • Sinus ... Block (ISt/2nd /3rd ... Differential #Diagnosis #Algorithm ... #causes
Syncope - Differential Diagnosis Algorithm Neurocardiogenic: • Vasovagal • Orthostatic Hypotension • Autonomic Neuropathy • Situational (micturition,
Differential Diagnosis Algorithm ... : • Sick Sinus ... Node) • 2nd/3rd ... Differential #Diagnosis #Algorithm ... #causes
Atrioventricular Blocks (AV blocks) - ECG Diagnosis Summary First Degree AV Block • The P wave is
• PR interval ... There is constant PR ... • The PR interval ... ecg #diagnosis #electrocardiogram ... #classification
Third Degree AV Block aka Complete Heart Block • In sinus rhythm with complete AV block,
Heart Block • In sinus ... • The PR interval ... #ThirdDegree #3rd ... ecg #diagnosis #electrocardiogram
Causes of ST Segment Elevation - Differential Diagnosis Framework STEMI: • Upsloping convex STE: "Pardee's sign" +
Causes of ST Segment ... not in aVL • PR-segment ... bundle-branch block; and sinus ... voltage Other Causes ... cardiology #ecg #ekg #electrocardiogram
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