Physiological maneuver 1)Change the body position Left recumbent MS Sitting, leaning forward: AI Squatting from standing, supine position, raising two legs may increase venous return.SV个CO个 Murmur of ml al个 Murmur of ihssv• Physiological maneuver 1) Change the body position - Left recumbent: MS - Sitting, leaning forward: AI - Squatting from standing, supine position, raising two legs may increase venous return, SV CO - Murmur of MI, AI - Murmur of IHSS