The use of various inotropes in the care of critically ill cardiac patients has become increasingly widespread: while predominantly used in decompensated heart failure, they have also been used in cardiogenic shock complicating acute coronary syndrome (ACS) and septic shock. Purported mechanisms of efficacy include improved cardiac output, improved end-organ perfusion, and vasodilation of both pulmonary and systemic circulations. Two of the most commonly used agents are Milrinone, a phosphodiesterase 3 inhibitor, and Dobutamine, a synthetic catecholamine with affinity for both beta-1 and 2 receptors. Both the American College of Cardiology (ACC) and the European Society of Cardiology (ESC) support inotropes for acute and chronic heart failure management with low cardiac output states. Furthermore, the ACC recommends consideration of inotropic therapy within the STEMI guidelines when ACS is complicated by cardiogenic shock, heart failure or for hemodynamic support in isolated right ventricle infarctions. Beyond primarily cardiac etiologies, inotropes have been identified as first-line additive therapy for cardiac augmentation to Norepinephrine in patients with septic shock complicated by myocardial dysfunction. Despite the lack of convincing data supporting a morbidity or mortality benefit with the use of inotropes in severe, decompensated heart failure, cardiogenic or septic shock, or in ACS, inotropic therapy is still widely used across various critical care settings. Furthermore, to date, there has been no head to head comparison of the two more commonly used positive inotropes: Dobutamine and Milrinone. Selection of one inotrope over another is often guided by physician and center preference, and consideration of and purported avoidance of possible adverse effects. In this pilot study, the investigators aim to describe that characteristics of patients receiving inotropic support in the CCU setting and identify possible differences in morbidity and mortality between Dobutamine and Milrinone among a heterogeneous population of patients admitted to the CCU at UOHI, which may help to inform a larger clinical trial in the future.