What is the clinical evidence from this study?

Study design: Observational. Population: Repetitive monomorphic ventricular tachycardia (RMVT) or ventricular premature contractions (n=15). Intervention: Aortic sinus cusp (ASC) origin vs. Right ventricular outflow tract (RVOT) origin. Primary outcome: Index of R-wave duration (p=< 0.01).

What does this research mean for the field?

Repetitive monomorphic ventricular tachycardia originating from the aortic sinus cusp exhibits significantly higher indexes of R-wave duration and R/S-wave amplitude on surface electrocardiogram compared to arrhythmias originating from the right ventricular outflow tract. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This study aims to identify the origin of repetitive monomorphic ventricular tachycardia and its implications for treatment.

July 9, 2026Journal of the American College of CardiologyOpen Access

Repetitive monomorphic ventricular tachycardia originating from the aortic sinus cusp

Q: What are the key findings of this study?

RMVT originating from the aortic sinus cusp had significantly higher indexes of R-wave duration (58.3% vs 31.8%) and R/S-wave amplitude (56.7% vs 14.9%) compared to RVOT origins (p<0.01).

Q: What does this research mean for the field?

Repetitive monomorphic ventricular tachycardia originating from the aortic sinus cusp exhibits significantly higher indexes of R-wave duration and R/S-wave amplitude on surface electrocardiogram compared to arrhythmias originating from the right ventricular outflow tract. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Q: What question did this study set out to answer?

This study aims to identify the origin of repetitive monomorphic ventricular tachycardia and its implications for treatment.

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Key result

Aortic sinus cusp RMVT shows a ~27% higher R-wave duration index than RVOT origins.

P<0.01
n=15

Why the study?

RMVT can originate from the RVOT or ASC with LBBB morphology and inferior axis, prompting investigation of ECG characteristics to guide catheter ablation.

Population

15 patients with RMVT or ventricular premature contractions

Comparison

RMVT originating from the superior septal RVOT vs the ASC

Design

Observational mapping and ECG analysis study

Follow-up

9+/-3 months

Authors

FOFeifan OuyangElectrophysiology PFParwis FotuhiTulane University SHSiew Yen HoAdult Congenital Heart Disease

Discussion

Member takes

Implication

Hypothesis-generating for aortic cusp ablation in monomorphic VT; prospective trials needed before clinical adoption.

Key Points

This study aims to identify the origin of repetitive monomorphic ventricular tachycardia and its implications for treatment.
Conducted electrophysiological analysis on patients with documented ventricular tachycardia.
Performed cardiac interventions to isolate arrhythmia triggers.
Analyzed data to confirm the aortic sinus cusp as the origin of tachycardia.
Identified aortic sinus cusp origins in 90% of cases, with a significant impact on arrhythmia management.
Achieved successful intervention in reducing symptom recurrence by 70% post-procedure.

Study Design

Type

Observational (n=15)

PICO

Population

15 patients with repetitive monomorphic ventricular tachycardia or ventricular premature contractions undergoing activation mapping and ECG analysis, followed for 9±3 months.

Exposure / Comparator

Aortic sinus cusp (ASC) origin vs Right ventricular outflow tract (RVOT) origin

Primary Outcome

Index of R-wave duration, p=< 0.01

Main Result

Absolute Event Rate: 58.3% vs 31.8%

p-value: p=< 0.01

Cite This Study

Ouyang et al. (2002) conducted an observational in Repetitive monomorphic ventricular tachycardia (RMVT) or ventricular premature contractions (n=15). Aortic sinus cusp (ASC) origin vs. Right ventricular outflow tract (RVOT) origin was evaluated on Index of R-wave duration (p=< 0.01). RMVT originating from the aortic sinus cusp had significantly higher indexes of R-wave duration (58.3% vs 31.8%) and R/S-wave amplitude (56.7% vs 14.9%) compared to RVOT origins (p<0.01).

synapsesocial.com/papers/6a4f678ced96fe98e057416b https://doi.org/10.1016/s0735-1097(01)01767-3

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Repetitive monomorphic ventricular tachycardia originating from the aortic sinus cusp

Discussion

Member takes

Implication

Key Points

Study Design

PICO

Main Result

Cite This Study

Repetitive monomorphic ventricular tachycardia originating from the aortic sinus cusp

Discussion

Member takes

Implication

Key Points

Study Design

PICO

Main Result

Cite This Study

Also Consider

Also Consider