86 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 ... boxes then QT interval ... • QT interval ... HR) / 180 #QTInterval
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 ... you use the JT Interval ... than prolonged QT interval ... #JTInterval #QTc
Antiarrhythmics - Vaughan Williams Classification
Class I (Ia, Ib, Ic) - Na+ Channel Blockade
 • Slows depolarization
and prolongs PR interval ... • Prolongs QT interval ... and prolongs PR interval
Arrhythmias - Differential Diagnosis Algorithm

Bradyarrhythmia (<60 bpm)
 • Sinus Bradycardia
 • Sick Sinus Syndrome
 • SA
(constant R-R Interval ... (variable R-R interval ... (constant R-R Interval ... (variable R-R interval
Wolff-Parkinson-White Syndrome

WPW is a congenital abnormality characterized by an abnormal accessory conduction pathway between the atria
and widened QRS interval ... ) 3 Short PR interval
Common toxicities of antifungal agents. 
CNS = central nervous system; 5-FC = flucytosine; GI = gastrointestinal;
= corrected QT interval
EKG Interpretation Cheat Sheet
1) Rate 
 - Regular - Count-Off 
 - Irregular - Count number
• PR interval < ... rhythm) • PR interval ... Atrial Flutter PR Interval ... waves QT/QTC Interval ... : • QT interval
Want to remember what drugs prolong the QT interval? Remember COLLAPSE - Kitty Canavan @KathrynCanavan1
#Diagnosis #Peds
prolong the QT interval
Second Degree AV Block Type I aka Mobitz I / Wenckebach 
 • Normal P waves.
shortening of the RR interval ... • The RR interval ... the shortest RR interval
Quinidine produces the following ECG changes:
1. Prolongation of Q-T interval:
2. Prolongation of QRS complex:
3. Prominent V
Prolongation of Q-T interval ... prolongation of P-R interval