119 results
The JT Interval and Pro-Arrhythmic Risk
Measured from the J-point to the end of the T-wave, the
The JT Interval ... than prolonged QT ... #JTInterval #QTc ... pathophysiology #ekg ... #ecg #cardiology
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
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
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
Normal QT Interval Measurement
General rule: QT interval should be < 1/2 RR interval
   -
Normal QT Interval ... General rule: QT ... in seconds) #QT ... cardiology #diagnosis #ecg ... #ekg #electrocardiogram
Torsades de Pointes
• "Twisting of the pointes" 
• QRS axis swings from positive to negative direction
that prolong the QT ... interval ... Diagnosis #Cardiology #ECG ... #EKG
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
Differential Diagnosis Algorithm ... (constant R-R Interval ... setting of long QT ... Differential #Diagnosis #Algorithm ... #causes
Recurrent Polymorphic VT/Torsades de Pointes - Management Algorithm
Drugs that prolong QT interval:
 • Class 1a (quinidine,
Pointes - Management Algorithm ... Drugs that prolong QT ... interval: • Class ... Congenital long QT ... 1b (lidocaine)- case
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 ... EricsMedicalLectures/ #QT ... cardiology #diagnosis #ecg