39 results
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 ... /QTc interval may ... • QT interval ... = QT / √RR
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 ... JTc=QTc-QRS When ... than prolonged QT ... #JTInterval #QTc
QT / QTc Interval Measurement in Irregular Rhythms
2 Approaches:
 • Measure and calculate the QTc for
QT / QTc Interval ... the associated QT ... for the QT intervals ... EricsMedicalLectures/ #QT ... #QTc #Interval
Want to remember what drugs prolong the QT interval? Remember COLLAPSE - Kitty Canavan @KathrynCanavan1
#Diagnosis #Peds
drugs prolong the QT ... interval? ... COLLAPSE #Mnemonic #QTc
Common toxicities of antifungal agents. 
CNS = central nervous system; 5-FC = flucytosine; GI = gastrointestinal;
= intravenous; QTc ... = corrected QT ... interval.
QT / QTc Interval Measurement in Wide QRS Complex
 - A wide QRS complex will lead
QT / QTc Interval ... increase in the QT ... interval that is ... EricsMedicalLectures/ #QT ... #QTc #Interval
Normal QT Interval Measurement
General rule: QT interval should be < 1/2 RR interval
   -
Normal QT Interval ... General rule: QT ... = QT / Sqrt(RR) ... in seconds) #QT ... #QTc #Interval
EKG Interpretation Cheat Sheet
1) Rate 
 - Regular - Count-Off 
 - Irregular - Count number
Flattened T waves QT ... /QTC Interval: ... • QT interval is ... = QT / √ RR - ... thumb: a normal QT
QT / QTc Interval Measurement in Prominent U Wave
If the U wave is distinct from the
QT / QTc Interval ... measurement of the QT ... interval. ... EricsMedicalLectures/ #QT ... #QTc #Interval
Torsades de Pointes 
•Precipitated by drugs that prolong the QT interval 
•Class IA antidysrhythmics (procainamide, quinidine)
that prolong the QT ... interval •Class