CMC ECG MASTERS
  • Home
    • About Us
    • EM GuideWire
    • CMC Ed Masters
    • Ped EM Morsels
  • Basics
  • P Waves
    • Sinus
    • Not sinus
    • Absent
  • PR interval
    • Short PR
    • Prolonged PR
    • Variable PR
  • QRS
    • Wide
    • Axis >
      • LAD
      • RAD
    • Amplitude >
      • High Voltage
      • Low Voltage
      • Alternans
    • R Wave Progression
    • Pathological Q waves
  • ST Segments
    • ST Elevation
    • ST Depression
  • T Waves
    • Flat, Bifid, or Notched
    • Inverted
  • QT intervals
    • Prolonged QT
    • Short QT
  • Patterns
    • STEMI
    • Pulmonary Embolism
    • Ventricular Hypertrophy
    • Pulmonary Disease
    • ST-T Patterns
    • Electrolyte Abnormalities
    • Cases >
      • Case 1
      • Case 2
      • Case 3
      • Case 4
      • Case 5
      • Case 6
      • Case 7
      • Case 8
      • Case 9
      • Case 10
      • Case 11
      • Case 12
      • Case 13
      • Case 14
      • Case 15
      • Case 16
      • Case 17
      • Case 18
      • Case 19
  • Interpreter

Prolonged QT

Picture
METABOLIC ABNORMALITIES
  • Hypokalemia
  • Hypocalcemia
  • Hypomagnesemia
  • Alkalosis
  • Liver failure
DRUG EFFECTS
  • Antiarrhythmics (potassium-channel blockers):
    • quinidine, procainamide, disopyramide, sotalol, amiodarone, dofetilide, ibutilide
  • Psychotropic agents (phenothiazines, haloperidol, TCAs, SSRIs)
  • Antibiotics (microlides, quinolones, azoles)
  • Antihistamines
  • Cocaine
  • Many others, especially in combination
ACUTE CNS DISORDERS
  • Subarachnoid hemorrhage
  • CVA, especially thalamic stroke
  • Brain tumor
  • Closed head injury
  • Status epilepticus
ACUTE MYOCARDIAL INJURY AND/OR CATECHOLAMINE EFFECT
  • Ischemia
  • Pulmonary edema (usually ~24 hrs after resolution)
  • Stress-induced cardiomyopathy (including Tako-Tsubo syndrome)
  • Massive PE
  • Adrenergic agonists (inotropes, inhalers)
  • Pheochromocytoma
  • Cocaine
​CONGENITAL LONG QT SYNDROME
Back to T waves
Short QT
Patterns
  • Home
    • About Us
    • EM GuideWire
    • CMC Ed Masters
    • Ped EM Morsels
  • Basics
  • P Waves
    • Sinus
    • Not sinus
    • Absent
  • PR interval
    • Short PR
    • Prolonged PR
    • Variable PR
  • QRS
    • Wide
    • Axis >
      • LAD
      • RAD
    • Amplitude >
      • High Voltage
      • Low Voltage
      • Alternans
    • R Wave Progression
    • Pathological Q waves
  • ST Segments
    • ST Elevation
    • ST Depression
  • T Waves
    • Flat, Bifid, or Notched
    • Inverted
  • QT intervals
    • Prolonged QT
    • Short QT
  • Patterns
    • STEMI
    • Pulmonary Embolism
    • Ventricular Hypertrophy
    • Pulmonary Disease
    • ST-T Patterns
    • Electrolyte Abnormalities
    • Cases >
      • Case 1
      • Case 2
      • Case 3
      • Case 4
      • Case 5
      • Case 6
      • Case 7
      • Case 8
      • Case 9
      • Case 10
      • Case 11
      • Case 12
      • Case 13
      • Case 14
      • Case 15
      • Case 16
      • Case 17
      • Case 18
      • Case 19
  • Interpreter