A case of ventricular premature contractions with multiple morphologies reproduced by a single ventricular extrastimulus with different coupling intervals

Naoyuki Miwa; Tadanori Nakata; Satoshi Hara; Tomohiro Tahara; Taiki Ishizawa; Hidenori Hirano; Yoshikazu Sato; Shigeki Kusa; Hitoshi Hachiya

doi:10.22541/au.172882983.37596869/v1

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A case of ventricular premature contractions with multiple morphologies reproduced by a single ventricular extrastimulus with different coupling intervals

Naoyuki Miwa,
Tadanori Nakata,
Satoshi Hara,
Tomohiro Tahara,
Taiki Ishizawa,
Hidenori Hirano,
Yoshikazu Sato,
Shigeki Kusa,
Hitoshi Hachiya

Abstract

; Introduction: A 22-year-old male with no prior cardiovascular history presented with frequent symptomatic ventricular premature contractions (VPCs) with multiple QRS morphologies despite bisoprolol treatment. Results: The coupling intervals progressively increased from VPC1 to VPC3, and VPC2 was the most frequent (VPC1: 9.3%, VPC2: 30.2%, VPC3: 0.5%). The earliest activation site was identified at the left-right coronary cusp junction. Single ventricular extrastimuli with variable coupling intervals from this site successfully reproduced QRS morphologies identical to VPC 1-3. Conclusion: The findings revealed the utility of unique pace-mapping technique in cases of VPCs with multiple morphologies.

11 Oct 2024Submitted to Journal of Cardiovascular Electrophysiology

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13 Oct 2024Review(s) Completed, Editorial Evaluation Pending

13 Oct 2024Submission Checks Completed

13 Oct 2024Assigned to Editor

13 Oct 2024Reviewer(s) Assigned

Abstract

Peer review status:UNDER REVIEW