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Clinical significance of ischemia-like electrocardiographic finding during heart failure treatment on left ventricular recovery in patients with non-ischemic dilated cardiomyopathy.
Journal of Cardiology 2021 Februrary 20
BACKGROUND: Patients with non-ischemic dilated cardiomyopathy (DCM) often show ischemia-like electrocardiographic findings. We aimed to elucidate the clinical impact of ischemia-like electrocardiographic findings in DCM, focusing on left ventricular reverse remodeling (LVRR).
METHODS: We evaluated 195 patients hospitalized with heart failure (HF) and diagnosed with DCM. All patients underwent twelve-lead electrocardiography (ECG) and echocardiography during hospitalization and at the 2-year follow-up.
RESULTS: During hospitalization, 152 (78%) patients experienced ischemia-like ECG findings (Minnesota codes I3, IV1-3, V1-3, or VII1); 43 patients (22%, non-ischemia-like group) did not experience these findings. Ischemia-like ECG findings were normalized during hospitalization in 64 patients (33%, transient-ischemia-like group) but were unchanged in 88 patients (45%, persistent-ischemia-like group). The highest rates of LVRR, defined as an increase in LV ejection fraction from ≥10% to a final value of ≥35%, along with decreased LV end-diastolic dimension of ≥10% during 2 years of follow-up, were shown in the transient-ischemia-like group (transient-ischemia-like group, 91%; persistent-ischemia-like group, 40%; non-ischemia-like-group, 51%; p < 0.001). The transient-ischemia-like group had lowest composite event rates, including readmission for HF, the detection of major ventricular arrhythmia, and sudden cardiac death.
CONCLUSIONS: Normalization of ischemia-like ECG findings during the first HF treatments was associated with a higher occurrence of mid-term LVRR and favorable long-term outcome in patients with DCM.
METHODS: We evaluated 195 patients hospitalized with heart failure (HF) and diagnosed with DCM. All patients underwent twelve-lead electrocardiography (ECG) and echocardiography during hospitalization and at the 2-year follow-up.
RESULTS: During hospitalization, 152 (78%) patients experienced ischemia-like ECG findings (Minnesota codes I3, IV1-3, V1-3, or VII1); 43 patients (22%, non-ischemia-like group) did not experience these findings. Ischemia-like ECG findings were normalized during hospitalization in 64 patients (33%, transient-ischemia-like group) but were unchanged in 88 patients (45%, persistent-ischemia-like group). The highest rates of LVRR, defined as an increase in LV ejection fraction from ≥10% to a final value of ≥35%, along with decreased LV end-diastolic dimension of ≥10% during 2 years of follow-up, were shown in the transient-ischemia-like group (transient-ischemia-like group, 91%; persistent-ischemia-like group, 40%; non-ischemia-like-group, 51%; p < 0.001). The transient-ischemia-like group had lowest composite event rates, including readmission for HF, the detection of major ventricular arrhythmia, and sudden cardiac death.
CONCLUSIONS: Normalization of ischemia-like ECG findings during the first HF treatments was associated with a higher occurrence of mid-term LVRR and favorable long-term outcome in patients with DCM.
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