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QT/QTc- Interval • Start of Q-wave to end of the T-wave (time of ventricular depolarization + repolarization). • Life threatening
QT/QTc- Interval ... /QTc interval may ... intervals are seen ... interval is 8 x ... • QT interval
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 in patients
Want to remember what drugs prolong the QT interval? Remember COLLAPSE - Kitty Canavan @KathrynCanavan1 #Diagnosis #Peds
drugs prolong the QT ... interval?
Common toxicities of antifungal agents. CNS = central nervous system; 5-FC = flucytosine; GI = gastrointestinal;
QTc = corrected QT ... interval.
Torsades de Pointes •Precipitated by drugs that prolong the QT interval •Class IA antidysrhythmics (procainamide, quinidine)
that prolong the QT ... interval •Class
QT / QTc Interval Measurement in Irregular Rhythms 2 Approaches: • Measure and calculate the QTc for
QT / QTc Interval ... the associated QT ... interval), and ... the QTc for the QT ... EricsMedicalLectures/ #QT
Torsades de Pointes • "Twisting of the pointes" • QRS axis swings from positive to negative direction
Originates from single focus ... that prolong the QT ... interval
Antiarrhythmics - Vaughan Williams Classification Class I (Ia, Ib, Ic) - Na+ Channel Blockade • Slows depolarization
and prolongs PR interval ... potential • Prolongs QT ... interval Class ... and prolongs PR interval
EKG Interpretation Cheat Sheet 1) Rate - Regular - Count-Off - Irregular - Count number
• PR interval < ... Flattened T waves QT ... • QT interval is ... formula: QTC = QT ... thumb: a normal QT
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 ... setting of long QT
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