27 July 2026
: Case report 
Transient Cardiac Dysfunction Due to New-Onset Mitral Chordal Rupture With Concomitant Congenital Absence of the Right Coronary Artery: A Case Report
Challenging differential diagnosis, Unusual setting of medical care, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)
Songyan Zhang E 1, Ying Cui F 1, Shucheng Li A 1*DOI: 10.12659/AJCR.952798
Am J Case Rep 2026; 27:e952798
Table 1 Key transthoracic echocardiography parameters at first and second admissions.
| Parameter | First admission (October 15, 2024) | Second admission (November 6, 2024) |
|---|---|---|
| LVEDD (mm) | 52 | 49 |
| LA (mm) | 38 | 39 |
| LVEF (%) | 43 (M-mode) | 56 (biplane Simpson) |
| Regional wall motion | Anterior and anteroseptal hypokinesis | Normal |
| Mitral regurgitation | Mild (qualitative) | Mild-to-moderate; vena contracta 3 mm, EROA 0.15 cm, regurgitant volume 25 mL |
| E-wave velocity (m/s) | — | 0.69 |
| A-wave velocity (m/s) | — | 0.95 |
| E/A ratio | — | 0.7 |
| Septal e’ velocity (cm/s) | — | 4.41 |
| Lateral e’ velocity (cm/s) | — | 5.61 |
| E/e’ ratio | — | 13.8 |
| Abbreviations: EROA, effective regurgitant orifice area; LA, left atrial dimension; LVEDD, left ventricular end-diastolic diameter; LVEF, left ventricular ejection fraction. | ||