Sudden cardiac arrest, heart attack, heart failure, heart valve disease- these are all terms that are common to problems with the heart. The normal heart has arteries, muscle, valves and conductive tissue. These parts act as the plumbing, mechanical, electrical, valves systems of the heart that keep the heart beating normally. Problems with these systems include heart attack, heart failure, sudden cardiac arrest, and heart valve disease. Rollover the buttons to view the differences between these problems and the system of the heart that they effect.