Apatient care technician (pct), marc, who is like a nurse’s assistant, is in a patient’s room. the intravenous (iv) machine starts to beep because the iv line gets tangled. the pct the patient to untangle the line, but the beeping continues. only nurses are trained to work with iv machines, but the nurse, aerin, is busy with another patient. marc knows that since the line is now clear, all aerin will need to do is hit a button to stop the beeping . what should marc do?

An 80-year-old woman comes to the urgent care clinic with dyspnoea on exertion. on physical examination, her blood pressure is 100/70, and her pulse is 75. she has no pulsus paradoxus. her jugular veins are distended, and she has distant heart sounds. in addition, she has extra third and fourth heart sounds. her liver is enlarged, and she has pedal oedema. she has occasional premature ventricular contractions on her electrocardiogram. a chest x-ray reveals clear lung fields with a dilated cardiac silhouette. her echocardiogram reveals ventricular walls with a "speckled pattern". which of the following is the most likely diagnosis? - alcoholic cardiomyopathy- amyloidosis- haemochromatosis- tuberculosis- viral myocarditis