Cardiac vortex

A cardiac vortex is the palpatory equivalent of a heart murmur.

We look for the cardiac vortex in the precordium and jugular fossa. Unlike a spike beat, it has a longer duration. It is caused by the transmission of the vibrations that are the source of the heart murmur to the surface of the chest. It is palpable at a murmur intensity of at least grade 4 (4/6).

Source
LEBL, Jan, Kamil PROVAZNÍK a Ludmila HEJCMANOVÁ, et al. Preklinická pediatrie. 2. vydání. Praha : Galén, 2007. s. 120. ISBN 978-80-7262-438-6.