<span>There are diagnostic analysis used to
identify patients with heart failure. One of which is echocardiogram and chest
x-ray that rely on imaging of the heart to assess its structure and function. Another
ancillary test to detect abnormalities that may point to heart failure is the B
type Natriuretic peptide, the detection of this serum levels is known to rise
in the heart failure syndrome.</span>
You need to read the introduction like this