An older woman is gardening in the direct sun for three hours without any rest. she suddenly feels weak and dizzy before she faints. she is taken to an emergency room where the doctor suspects she is suffering from dehydration. this is a common problem in older people because:

the ecg findings of an acute anterior myocardial infarction wall include: st segment elevation in the anterior leads (v3 and v4) at the j point and sometimes in the septal or lateral leads, depending on the extent of the mi. this st segment elevation is concave downward and frequently overwhelms the t wave.

explanation: