<unk>  is one of several, similar sounds. A differential diagnosis may be possible, or not, depending upon the number of components that are audible.<unk>  may have one, two, or three audible components, whereas the similar pleural<unk> <unk>  ordinarily has two audible components. One- and two-component<unk> s are ambiguous. A three-component<unk>  distinguishes a<unk> <unk>  and indicates the presence of pericarditis. Also, a pleural<unk>  can only be heard during inspiration , whereas, the<unk> <unk>  can be heard even after cessation of breathing. Pleural<unk>  creates pain mostly on the lateral part of the chest wall, whereas pain due to<unk> <unk>  is always central in location. The intensity of pleural<unk>  is increased on pressing the diaphragm of the stethoscope over the affected area, whereas there is no such change in case of a<unk> <unk> .
Pericardial friction rub
Pulsus alternans
Pulsus paradoxus
Pulsus bigeminus
Hyperdynamic precordium
Heart click
Sail sign of the chest
Carey Coombs murmur