2272 results
Approach to ECGs - Syncope Syndromes
Electrolytes
 • ↑K - brady, peak T, wide QRS, no P,
• ↑ Ca - short QT ... • ↓ Ca - long QT ... • ↓ Mg - long QT ... -500ms) Short QT ... electrocardiogram #differential
Causes of Sudden Cardiac Arrest
Primary Myocardial Processes (> 90%):
 • Acquired structural heart disease: CAD, Most
Channelopathies: Long/short QT ... Acquired long QT ... Arrest #cardiology #differential
Torsades de Pointes (TdP): Pathogenesis and Clinical Findings

Polymorphic ventricular tachycardia initiated by PVC in the setting
the setting of QT ... cardiology #causes #differential
ABCDEF Mnemonic for Drugs Causing QT Prolongation

A - Anti-Arrhythmics (amiodarone, sotalol, dofetilide)
B - Anti-Biotics (fluoroquinolones, macrolides)
C
Drugs Causing QT ... #Pharmacology #Differential ... #DrugInduced #QT
QTc Prolongation - Medications and Conditions that Prolong QT: From "A to N"
A - Anti-A-rrhythmics
B -
Conditions that Prolong QT ... #Prolongation #differential ... diagnosis #table #QT
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Arrhythmias - Differential ... setting of long QT ... tachyarrhythmias #Cardiology #Differential
Causes of ST Segment Elevation - Differential Diagnosis Framework

STEMI:
 • Upsloping convex STE: "Pardee's sign" +
Segment Elevation - Differential ... and a prolonged QT ... waves - Short QT ... waves • Short QT ... Segment #Elevation #differential
Cardiomyopathies 

Manifestations of cardiomyopathy (CM) range from microscopic alterations in cardiac myocytes to fulminant Heart Failure
CPVT) • Short QT ... cardiology #diagnosis #differential
Premature Ventricular Complexes (PVC's) - Summary Framework

Why PVCs?  Can be the first manifestation of cardiac
syndromes (e.g., long QT ... may not occur Differential ... PVC #diagnosis #differential
QT/QTc- Interval
•	Start of Q-wave to end of the T-wave (time of ventricular depolarization + repolarization).
•	Life threatening
QT/QTc- Interval ... ) • Prolonged QT ... • Shortened QT ... • QT interval ... [QT nomogram]