225 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 ... pathophysiology #ekg ... #ecg #cardiology
ECG Cheat Sheet

ECG rapid view: It is organized roughly how one would typically read an ECG.
ECG Cheat Sheet ... ECG rapid view ... typically read an ECG ... atrial, ventricle), Intervals ... (PR, QRS, QT),
Torsades de Pointes 
•Precipitated by drugs that prolong the QT interval 
•Class IA antidysrhythmics (procainamide, quinidine)
that prolong the QT ... interval •Class ... Diagnosis #Cardiology #ECG ... #EKG
QT/QTc- Interval
•	Start of Q-wave to end of the T-wave (time of ventricular depolarization + repolarization).
•	Life threatening
QT/QTc- Interval ... intervals are seen ... interval is 8 x ... • QT interval ... (Works for regular
QT / QTc Interval Measurement in Irregular Rhythms
2 Approaches:
 • Measure and calculate the QTc for
QT / QTc Interval ... the associated QT ... the QTc for the QT ... on the EKG, and ... cardiology #diagnosis #ecg
Normal QT Interval Measurement
General rule: QT interval should be < 1/2 RR interval
   -
Normal QT Interval ... General rule: QT ... - Only works ... cardiology #diagnosis #ecg ... #ekg #electrocardiogram
Digoxin effect on Electrocardiogram (EKG)
Digoxin is a cardiac glycoside from the foxglove leaf
Mechanism
 - Inhibits Na-K
nodal conduction Uses ... Digoxin effect on ECG ... waves - Short QT ... interval Dr. ... Cardiology #Digitalis #ECG
Torsades de Pointes
• "Twisting of the pointes" 
• QRS axis swings from positive to negative direction
that prolong the QT ... interval ... Diagnosis #Cardiology #ECG ... #EKG
EKG Interpretation Cheat Sheet
1) Rate 
 - Regular - Count-Off 
 - Irregular - Count number
Flattened T waves QT ... • QT interval is ... formula: QTC = QT ... thumb: a normal QT ... Interpretation #ECG
Electrocardiographic Features of Digoxin Toxicity
 • Virtually any arrhythmia is possible. None specific for digoxin toxicity
Shortening of QT ... interval • "Scooped ... Electrocardiogram #ekg ... #ecg #toxicology