This will be a prospective and multicentric data-bank registry. Initially, all patients with acute coronary syndromes (ACS), acute decompensated heart failure (ADHF), warfarin intoxication, acute pulmonary edema, acute aortic dissection, chest pain, pulmonary embolism and syncope will be included. There will be not exclusion criteria. The inclusion criteria will be followed by definition of each illness described in recent guidelines. Investigators estimated annually over than 500 cases with ACS/chest pain, 300 cases of ADHF, 200 cases of aortic dissection, 200 of pulmonary embolism, 200 cases of warfarin intoxication, 100 cases of syncope and 150 of acute pulmonary edema. Clinical data, electrocardiographic and echocardiographic findings, laboratory results and prognosis will be related. Routine of treatment will be defined by each center. The analysis includes minimum, medium and maximum values. Variables will be adjusted according with each diagnosis and all data will be included using the REDCap digital data entry. Probabilities will be determined by logistic regression and will be considered significate when p < 0.005. Prospectively, investigators will use the Cox model to calculate associations.