BACKGROUND: Frequent premature ventricular complexes from the right ventricular outflow tract (RVOT-PVCs) are associated with left ventricular dysfunction. This study adopted two-dimensional speckle tracking imaging to evaluate global and regional left ventricular myocardial function in patients with frequent RVOT-PVCs. METHODS: This study included 30 patients with frequent RVOT-PVCs and 30 healthy subjects. Aortic systolic velocity-time integral (AoVTI) and myocardium strain in circumferential (CS), radial (RS) and longitudinal (LS) directions were evaluated by conventional echocardiography and speckle tracking imaging. All values of patients with RVOT-PVCs were recorded during sinus (PVC-S) and PVC beats (PVC-V). RESULTS: Significant differences were demonstrated in global CS, RS and LS between the control subjects and the PVC-V (CS: (17.46 ± 2.48)% vs. (11.52 ± 3.28)%, RS: (48.26 ± 10.20)% vs. (20.92 ± 9.78)%, LS: (19.89 ± 2.62)% vs. (11.79 ± 3.66)%, P < 0.01), and in segmental RS and LS of nearly all the left ventricular segments. Statistical differences in segmental CS between the PVC-V and the control subjects were only observed in anterior, anteroseptal and septal segments (only seen in anteroseptal and septal segments at apex). Furthermore, V/S AoVTI (AoVTI during the PVC beat divided by AoVTI during the sinus beat, then multiplied by 100%) correlated with coupling interval (r = 0.67, P < 0.001) and global strain (CS: r = 0.48, P = 0.007; RS: r = 0.65, P < 0.001; LS: r = 0.65, P < 0.001). CONCLUSIONS: Frequent RVOT-PVCs can induce global and regional left ventricular systolic dysfunction. The reduction of hemodynamic parameters relates to the coupling interval and the global systolic function.
BACKGROUND: Frequent premature ventricular complexes from the right ventricular outflow tract (RVOT-PVCs) are associated with left ventricular dysfunction. This study adopted two-dimensional speckle tracking imaging to evaluate global and regional left ventricular myocardial function in patients with frequent RVOT-PVCs. METHODS: This study included 30 patients with frequent RVOT-PVCs and 30 healthy subjects. Aortic systolic velocity-time integral (AoVTI) and myocardium strain in circumferential (CS), radial (RS) and longitudinal (LS) directions were evaluated by conventional echocardiography and speckle tracking imaging. All values of patients with RVOT-PVCs were recorded during sinus (PVC-S) and PVC beats (PVC-V). RESULTS: Significant differences were demonstrated in global CS, RS and LS between the control subjects and the PVC-V (CS: (17.46 ± 2.48)% vs. (11.52 ± 3.28)%, RS: (48.26 ± 10.20)% vs. (20.92 ± 9.78)%, LS: (19.89 ± 2.62)% vs. (11.79 ± 3.66)%, P < 0.01), and in segmental RS and LS of nearly all the left ventricular segments. Statistical differences in segmental CS between the PVC-V and the control subjects were only observed in anterior, anteroseptal and septal segments (only seen in anteroseptal and septal segments at apex). Furthermore, V/S AoVTI (AoVTI during the PVC beat divided by AoVTI during the sinus beat, then multiplied by 100%) correlated with coupling interval (r = 0.67, P < 0.001) and global strain (CS: r = 0.48, P = 0.007; RS: r = 0.65, P < 0.001; LS: r = 0.65, P < 0.001). CONCLUSIONS: Frequent RVOT-PVCs can induce global and regional left ventricular systolic dysfunction. The reduction of hemodynamic parameters relates to the coupling interval and the global systolic function.
Authors: Gurukripa N Kowlgi; Alex Y Tan; Karoly Kaszala; Michael C Kontos; Pedro Lozano; Kenneth A Ellenbogen; Jose F Huizar Journal: Front Cardiovasc Med Date: 2022-08-24
Authors: Øyvind H Lie; Jørg Saberniak; Lars A Dejgaard; Mathis K Stokke; Finn Hegbom; Ole-Gunnar Anfinsen; Thor Edvardsen; Kristina H Haugaa Journal: ESC Heart Fail Date: 2017-07-10