Figure 1. Ultrasound assessment of skeletal muscles.
Panel A: Measurement of the biceps brachii and brachialis thickness at the midpoint between the acromion and olecranon, with the patient seated or lying down.
Panel B: Quadriceps and rectus femoris muscle thickness measured at the midpoint between the lateral condyle and the greater trochanter, with the patient in a supine position.
Panel C: Diaphragm thickness measured between the right anterior and mid-axillary lines at the lowest intercostal space, during both natural expiration and full inspiration.
From: Design, Rational, and Baseline Characteristics of the SONIC-HF Multicenter Registry
