Advanced congestive heart failure (CHF) accounts for over one million hospital admissions yearly in the U.S. and is associated with a 2-year mortality rate of up to 40% - 50% (according to the American Heart Association 1997 and the CONSENSUS Trial Study Group, 1987). Inpatient therapy for acutely worsening CHF often includes intravenous (IV) agents to reduce intracardiac filling pressures and to increase cardiac output. Examples of such agents include drugs that increase the heart muscle contractility such as dobutamine and phosphodiesterase inhibitors such as milrinone. While these agents do achieve good blood flow throughout the body in most patients, several studies suggest that arrhythmias (irregular heart beats) can be increased in some patients treated with dobutamine or milrinone (according to Smith TW, et al 1997 and Holmes JR et al 1985; and Anderson JL et al 1986). Arrhythmias are common in patients with advanced CHF and may contribute to their sudden death rate of 30% to 70% (according to Stevenson WG, et al 1993).