Inclusion Criteria:  Subject who was diagnosed with congestive heart failure and objective evidence of pulmonary congestion (pulmonary edema on simple chest radiography or positive B-line on lung ultrasonography AND elevated BNP or NT-proBNP level) as a reason for invasive mechanical ventilation Age over 19 years old Subject who agrees to the study protocol and the schedule of clinical follow-up, and provides informed, written consent, as approved by the appropriate Institutional Review Board/Ethical Committee of the clinical site.  Exclusion Criteria:  Subject who are on mechanical circulatory support (ECMO, IABP, VAD) at the time of randomization Subject who has cardiac abnormality that requires emergent or urgent percutaneous or surgical valvular procedure Subject who are on vasoactive or inotropic agents at least moderate dose defined as vasoactive-inotropic score >10 Isolated preload-dependent cardiac dysfunction (isolated RV failure, RV infarction, constrictive pericarditis, cardiac tamponade, severe pulmonary hypertension without LV dysfunction) Predominant RV failure defined as following; clinical evidence of RV failure by attending physician's discretion including hepatojugular reflux, Kussmaul sign, cardiac liver cirrhosis, hepato/splenomegaly, acites, thronmbocytopenia, etc. Subject who are not on mechanical ventilation before open heart surgery Subject who received unwitness cardiopulmonary rescucitation (CPR) or witness CPR lasting more than 30 minutes Subject who was already diagnosed or is suspected to have hypertophic cardiomyopathy with significant left ventricular outflow tract (LVOT) obstruction Subject with intracranial hemorrahge or ischemic stroke at the time of randomization Subject with irreversible neurologic damage or irreversible hepatic failure Invasive mechanical ventilation lasting more than 12 hours preceding ICU admission Subject with underlying COPD (COLD classification III or IV) or restrictive pulmonary disease (e.g. interstitial lung disease) Subject with impaired consciousness that can not perform self coughing and need suction to maintain adequate airway patency Pregnant and/or lactating women Subject with life expectancy less than a year Subject who is not suitable to enrollment by investigator's discretion