What does CENTRAL INTELLIGENCE AGENCY (CIA) mean? Central Intelligence Agency (CIA) The Central Intelligence Agency is one of the principal intelligence-gathering agencies of the United States federal government. An executive agency, it reports to the Director of National Intelligence.
If heart failure progresses, the apnea may be so acute that a person, unable to breathe, may awaken from sleep in panic. Diagnosis. Doctors can often make a preliminary diagnosis of heart failure by medical history and careful physical examination. A thorough medical history may identify risks for heart failure that include:
Conditions that damage or overwork the heart muscle can cause heart failure. Over time, the heart weakens. It isnât able to fill with and/or pump blood as well as it should. As the heart weakens, certain proteins and substances might be released into the blood. These substances have a toxic effect on the heart and blood flow, and they worsen heart failure. Causes of heart failure include: Coronary heart disease.