Mackenzie polygraph

Mac·ken·zie pol·y·graph

(mă-ken'zē),
an instrument consisting of a system of tambours and a time-marker for recording simultaneously the jugular and arterial pulses and the apex beat; formerly used in the clinical investigation of cardiac arrhythmias.

Mackenzie,

Sir James, Scottish physician in England, 1853-1925.
Mackenzie polygraph - an instrument formerly used in the clinical investigation of cardiac arrhythmias.
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