Elevated S-T segment indicates?

Elevated S-T segment indicates?

• A. Pulmonary edema
• B. Heart failure
• C. Myocardial infarction
• D. Myocardial injury

Answer: (D)

Elevated ST segments reflect acute injury to the heart muscle from ischemia. When myocardial cells are injured, the resting membrane potentials create an injury current that shifts the ST segment upward in the leads facing the affected area. This is one of the earliest electrocardiographic signs of acute cardiac injury and can precede necrosis. It isn’t about fluid overload or pump failure, which relate to pulmonary edema or heart failure and don’t produce ST elevation. While an infarction can accompany ST elevation, the best single concept indicated by elevated ST is myocardial injury, making that option the most accurate choice.

Elevated ST segments reflect acute injury to the heart muscle from ischemia. When myocardial cells are injured, the resting membrane potentials create an injury current that shifts the ST segment upward in the leads facing the affected area. This is one of the earliest electrocardiographic signs of acute cardiac injury and can precede necrosis. It isn’t about fluid overload or pump failure, which relate to pulmonary edema or heart failure and don’t produce ST elevation. While an infarction can accompany ST elevation, the best single concept indicated by elevated ST is myocardial injury, making that option the most accurate choice.