56 results
The JT Interval and Pro-Arrhythmic Risk
Measured from the J-point to the end of the T-wave, the
The JT Interval ... T-wave, the JT interval ... than prolonged QT ... #electrocardiogram ... pathophysiology #ekg #ecg #cardiology
QT / QTc Interval Measurement in Irregular Rhythms
2 Approaches:
 • Measure and calculate the QTc for
QT / QTc Interval ... the associated QT ... Irregular #Rhythm #cardiology ... #diagnosis #ecg ... #ekg #electrocardiogram
Mobitz Type I (Wenckebach Phenomenon) 2nd Degree AV Block on EKG
 • P-R interval gradually increases
Phenomenon) 2nd Degree ... on EKG • P-R interval ... Block #AVBlock #diagnosis ... #cardiology #EKG ... #ECG #Electrocardiogram
Second Degree Heart Block, Mobitz Type I (Wenckebach)

P waves and QRS complexes are normal but... 
•
Second Degree Heart ... • PR interval ... SecondDegree #HeartBlock #Diagnosis ... #Cardiology #EKG ... #ECG #Electrocardiogram
Second degree AV Block type II (aka Mobitz II)
 • There is constant PR interval (normal
Second degree AV ... is constant PR interval ... MobitzII #Type2 #diagnosis ... #cardiology #ecg ... #ekg #electrocardiogram
Normal QT Interval Measurement
General rule: QT interval should be < 1/2 RR interval
   -
Normal QT Interval ... General rule: QT ... #Measurement #cardiology ... #diagnosis #ecg ... #ekg #electrocardiogram
Second Degree AV Block Type I aka Mobitz I / Wenckebach 
 • Normal P waves.
Second Degree AV ... #Second #Degree ... Type1 #Wenckebach #diagnosis ... #cardiology #ecg ... #ekg #electrocardiogram
Approach to ECGs - Syncope Syndromes
Electrolytes
 • ↑K - brady, peak T, wide QRS, no P,
• ↑ Ca - short QT ... • ↓ Ca - long QT ... see below), 1st degree ... EKG #Checklist #diagnosis ... #cardiology #electrocardiogram
Second Degree Heart Block, Mobitz Type II

• p waves are normal 
• QRS complexes are usually
Second Degree Heart ... branch block • PR intervals ... SecondDegree #HeartBlock #Diagnosis ... #Cardiology #EKG ... #ECG #Electrocardiogram
Electrocardiographic Features of Digoxin Toxicity
 • Virtually any arrhythmia is possible. None specific for digoxin toxicity
Shortening of QT ... interval • "Scooped ... digitalis #Toxicity #Electrocardiogram ... ecg #toxicology #cardiology ... #diagnosis