The heart has a language of its own that can be read on an EKG scan. It always tells the truth although sometimes it keeps secrets. The scan can tell you many things about the heart, however certain arrhythmias may only show up if the occur when the scan is being done. Once you learn the language of the heart it remains the same. The heart always tries to keep going on and that shows up on the scan as the electrical system starts firing off in different areas if the sinoartial mode does not fire off first.
The following is a very simple and brief explanation of the forms of cardiac events.
A cardiac arrest is an abrupt loss of heart function caused by the hearts electrical system malfunctioning. The term “sudden” typically precedes the term cardiac arrest as it usually is sudden and is commonly caused by ventricular fibrillation. A healthy heart’s electrical system fires off in the sinoartial mode which is the pacemaker. When there is a problem in the heart it can start firing off in different locations. If the heart starts to fire off in the lower ventricle rapidly and without allowing the heart to refill this is the ventricle fibrillation that causes cardiac arrest.
A stroke or cerebrovascular accident is a lack of blood flow to the brain. An ischemic stroke is from a blockage preventing blood flow. A hemorrhagic stroke is due to bleeding in the brain. A transient ischemic attack often is called a mini stroke and it is a warning caused by a clot. This waring should be taken seriously.
A heart attack or myocardial infarction is damage to the heart muscle tissue or tissue death due to a lack of blood supply. This happens because of a coronary artery disease or by a spasm of a coronary artery reducing blood supply to the heart muscle. Myocardial ischemia is reduced blood flow to the heart muscle typically caused by blockage. Myocardial ischemia causes myocardial infarction. Ischemia causing heart muscle tissue death is a myocardial infarction or heart attack.