Abstract #4687

Three-dimensional left ventricular torsion after pulmonary valve replacement in repaired tetralogy of Fallot: motion tracking analysis

Yurie Shirai¹, Michinobu Nagao², Atsushi Yamamoto¹, Kei Inai³, Takeshi Shinkawa⁴, Seiko Shimizu⁵, and Shuji Sakai¹

¹Diagnostic Imaging and Nuclear Medicine, Tokyo Women’s Medical University, Shinjuku, Japan, ²Tokyo Women’s Medical University, Shinjuku, Japan, ³Pediatric Cardiology, Tokyo Women’s Medical University, Shinjuku, Japan, ⁴Cardiovascular Surgery, Tokyo Women’s Medical University, Shinjuku, Japan, ⁵Canon Medical, Chuo, Japan

Synopsis

Keywords: Heart, CardiovascularIn patients with repaired tetralogy of Fallot (TOF), pulmonary regurgitation is a frequent complication, resulting in right heart failure. Pulmonary valve replacement (PVR) should be performed before irreversible heart failure occurs. Pulmonary regurgitation disappears and RV volume decreases with PVR. Interventricular interactions are expected to improve left ventricular (LV) function, but in some cases LV function is not restored. We analyzed pre- and post-PVR cine cardiac MRI (CMR) with a motion tracking technique to quantitatively assess LV deformity in three dimensions. As a result, a decrease in preoperative LV torsion was a useful predictor of postoperative worsening LV function.

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