Time Course of Left Ventricular Strain Assessment via Cardiovascular Magnetic Resonance Myocardial Feature Tracking in Takotsubo Syndrome.
Hiroki GotoKen KatoYoichi ImoriMasaki WakitaNoriko EguchiHiroyuki TakaokaTsutomu MurakamiYuji NagatomoToshiaki IsogaiYuya MitsuhashiMike SajiSatoshi YamashitaYuichiro MaekawaHiroki MochizukiYoshimitsu TakaokaMasafumi OnoTetsuo YamaguchiYoshio KobayashiKuniya AsaiWataru ShimizuTsutomu YoshikawaPublished in: Journal of clinical medicine (2024)
Background: Although takotsubo syndrome (TTS) is characterized by transient systolic dysfunction of the left ventricle (LV), the time course and mechanism of LV function recovery remain elusive. The aim of this study is to evaluate cardiac functional recovery in TTS via serial cardiac magnetic resonance feature tracking (CMR-FT). Methods: In this Japanese multicenter registry, patients with newly diagnosed TTS were prospectively enrolled. In patients who underwent serial cardiovascular magnetic resonance (CMR) imaging at 1 month and 1 year after the onset, CMR-FT was performed to determine the global circumferential strain (GCS), global radial strain (GRS) and global longitudinal strain (GLS). We compared LV ejection fraction, GCS, GRS and GLS at 1 month and 1 year after the onset of TTS. Results: Eighteen patients underwent CMR imaging in one month and one year after the onset in the present study. LV ejection fraction had already normalized at 1 month after the onset, with no significant difference between 1 month and 1 year (55.8 ± 9.2% vs. 58.9 ± 7.3%, p = 0.09). CMR-FT demonstrated significant improvement in GCS from 1 month to 1 year (-16.7 ± 3.4% vs. -18.5 ± 3.2%, p < 0.01), while there was no significant difference in GRS and GLS between 1 month and year (GRS: 59.6 ± 24.2% vs. 59.4 ± 17.3%, p = 0.95, GLS: -12.8 ± 5.9% vs. -13.8 ± 4.9%, p = 0.42). Conclusions: Serial CMR-FT analysis revealed delayed improvement of GCS compared to GRS and GLS despite of rapid recovery of LV ejection fraction. CMR-FT can detect subtle impairment of LV systolic function during the recovery process in patients with TTS.
Keyphrases
- ejection fraction
- aortic stenosis
- left ventricular
- magnetic resonance
- newly diagnosed
- heart failure
- blood pressure
- machine learning
- mitral valve
- oxidative stress
- deep learning
- coronary artery disease
- cross sectional
- magnetic resonance imaging
- hypertrophic cardiomyopathy
- computed tomography
- contrast enhanced
- case report
- left atrial
- blood brain barrier
- pulmonary artery
- prognostic factors
- ultrasound guided
- aortic valve
- atrial fibrillation
- transcatheter aortic valve replacement
- cerebral ischemia