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cardiology ekg interval clinical elevation syncope acidosis bazetts bradyarrhythmia bradycardia changes checklist classification complexes echocardiogram embolism emergency formula hyperkalemia irregular
Normal QT Interval Measurement General rule: QT interval should be < 1/2 RR interval -
Normal QT Interval ... rule: QT interval ... = QT / Sqrt(RR) ... #cardiology #diagnosis ... #ecg #ekg #electrocardiogram
QT / QTc Interval Measurement in Wide QRS Complex - A wide QRS complex will lead
QT / QTc Interval ... increase in the QT ... EricsMedicalLectures/ #QT ... #cardiology #diagnosis ... #ecg #ekg #electrocardiogram
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 ... Rhythm #cardiology #diagnosis ... #ecg #ekg #electrocardiogram
QT / QTc Interval Measurement in Prominent U Wave If the U wave is distinct from the
QT / QTc Interval ... of the QT interval ... EricsMedicalLectures/ #QT ... #cardiology #diagnosis ... #ecg #ekg #electrocardiogram
Approach to ECGs - Syncope Syndromes Electrolytes • ↑K - brady, peak T, wide QRS, no P,
• ↑ Ca - short QT ... • ↓ Ca - long QT ... #diagnosis #cardiology ... #electrocardiogram ... #differential
Hyperkalemia shortens repolarization; changes in the T wave provide the earliest clues to hyperpotassemia. - At
repolarization causes ... prolonged PR and QT ... #Diagnosis #Hyperkalemia ... #EKG #ECG #Changes ... #Progression #Table
Approach to ECGs - Tachy/Bradyarrhythmias Tachyarrhythmias - HR > 100 Wide (1) VT - DANGER (2)
Approach to ECGs ... 200ms from longer pause ... #EKG #diagnosis ... #electrocardiogram ... #cardiology #differential
Causes of ST Segment Elevation - Differential Diagnosis Framework STEMI: • Upsloping convex STE: "Pardee's sign" +
Causes of ST Segment ... and a prolonged QT ... waves - Short QT ... waves • Short QT ... #ecg #ekg #electrocardiogram
Pulmonary Embolism on ECG Mid 30's female with chest pain/dyspnea. Triage EKG (no prior).
Differential/diagnosis ... See thread for POCUS ... seen in 34% of cases ... Pulmonary #Embolism #ECG ... #EKG #Electrocardiogram
Premature Ventricular Complexes (PVC's) - Summary Framework Why PVCs? Can be the first manifestation of cardiac
., long QT syndrome ... heart disease Causes ... may not occur Differential ... Diagnosis: • PAC ... #differential #
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