Guidelines recommend that doctors incorporate many practices to prevent cardiovascular disease (heart attack and stroke) into routine health care for their patients. These practices include, for example, measurement of blood pressure and cholesterol level and treatment when either is high. Other recommended practices include certain tests and treatments for patients who have conditions such as heart failure or diabetes. Unfortunately, although guidelines recommend various interventions to prevent cardiovascular disease, doctors sometimes forget to include all of these interventions in the care of every patient. Many hospitals and other health care settings have developed programs to improve care, but these programs often have limited success. Some experts believe that quality improvement programs with multiple components are more effective than simpler programs.