What does it mean to relax with deep breathing?
a. inhale slowly through the nose, hold breath for a few seconds and exhale through the mouth
b. inhale slowly through the mouth, exhale through one’s teeth
c. inhale quickly through the mouth, hold breath for a few seconds and exhale through the nose
d. inhale slowly through the mouth, hold breath for a few seconds and exhale through the nose

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