What question did this study set out to answer?

The study aims to enhance risk assessment for late onset sudden death in children who underwent surgery for tetralogy of Fallot.

December 1, 1997Journal of Cardiovascular Electrophysiology

Electrocardiographic Markers of Late Sudden Death Risk in Postoperative Tetralogy of Fallot Children

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Why the study?

Do resting ECG markers such as QRS duration predict late ventricular tachycardia or sudden death in children with postoperative tetralogy of Fallot?

Key Points

The study aims to enhance risk assessment for late onset sudden death in children who underwent surgery for tetralogy of Fallot.
Analyzed 101 resting ECGs from children with postoperative TOF and RBBB, comparing to 1000 normal ECGs.
Measured various ECG markers including QRS duration, QTc, JTc, and dispersions to assess arrhythmia risk.
Evaluated the predictive value of identified markers for ventricular tachycardia and sudden death.
Mean QRS duration in the VT group was 0.18 seconds vs. 0.14 seconds in the non-VT group (P < 0.01).
QTc and JTc in the VT group were similar to the non-VT group, with no significant differences (P = NS).
Prolonged QRS duration is more predictive of arrhythmias than QTc or JTc in this population.

Structured PICO

Do resting ECG markers such as QRS duration predict late ventricular tachycardia or sudden death in children with postoperative tetralogy of Fallot?

Population

101 children (age 12 +/- 6 years) with postoperative tetralogy of Fallot (TOF) and right bundle branch block (RBBB), and 1000 age- and gender-matched normal controls.

Intervention

Assessment of resting ECG markers including QRS duration, QTc, JTc, and interlead QT and JT dispersion

Comparator

Comparison between TOF patients who developed late ventricular tachycardia or sudden death (n=14), TOF patients who did not (n=87), and normal controls (n=1000)

Outcome

Late ventricular tachycardia (VT) or sudden deathhard clinical

A prolonged QRS duration on resting ECG is a strong predictor of late ventricular tachycardia and sudden death in children with postoperative tetralogy of Fallot and right bundle branch block.

Discussion

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Implication

QRS prolongation was associated with VT in postoperative TOF; hypothesis-generating for ECG risk stratification, needing prospective validation.

Cite This Study

Berul et al. (1997) studied this question.

synapsesocial.com/papers/69ffcc1b7e61d2a3f0c2324b https://doi.org/10.1111/j.1540-8167.1997.tb01031.x

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Implication

QRS prolongation was associated with VT in postoperative TOF; hypothesis-generating for ECG risk stratification, needing prospective validation.

Electrocardiographic Markers of Late Sudden Death Risk in Postoperative Tetralogy of Fallot Children

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Electrocardiographic Markers of Late Sudden Death Risk in Postoperative Tetralogy of Fallot Children

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Also Consider