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Cardiac Waveform Monitor

IP.com Disclosure Number: IPCOM000017454D
Original Publication Date: 2001-Jan-01
Included in the Prior Art Database: 2003-Jul-22
Document File: 2 page(s) / 67K

Publishing Venue

Siemens

Related People

Leif Lindkvist: AUTHOR

Abstract

The extra-stimulus pulse study is a frequently used diagnostic method employed in electrophysiology studies. For this study the heart is electrically stimulated using a drive train of typically eight uniformly spaced pulses followed by a premature or a so-called "extra-stimulus" pulse. The time interval ("coupling interval") between the last pulse of the pulse train and the extra- stimulus pulse is arranged to be shorter than that between pulses of the pulse train. In order to diagnose the condition of the heart the electrophysiologist then monitors the variation in the time- dependent cardiac waveform, generated in response to the applied pulses, as this coupling interval is decreased.

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Gesundheit

Cardiac Waveform Monitor

Idee: Leif Lindkvist, Solna (Sweden)

The extra-stimulus pulse study is a frequently used diagnostic method employed inelectrophysiology studies. For this study the heart is electrically stimulated using a drive train oftypically eight uniformly spaced pulses followed by a premature or a so-called "extra-stimulus"pulse. The time interval ("coupling interval") between the last pulse of the pulse train and the extra-stimulus pulse is arranged to be shorter than that between pulses of the pulse train. In order todiagnose the condition of the heart the electrophysiologist then monitors the variation in the time-dependent cardiac waveform, generated in response to the applied pulses, as this couplinginterval is decreased.

Traditionally this monitoring is done by inspecting waveforms in real time on a monitor arrangedwith a relatively high sweep speed such that one screen width corresponds to approximately 2.5seconds. This requires the electrophysiologist to constantly change his eye focus as the responsewill occur at different horizontal screen locations for different cardiac cycles. Moreover, theelectrophysiologist is required to remember the shape and location of the spontaneous time-dependent cardiac waveform if its change with coupling interval is to be monitored.

Summary of Invention

A cardiac waveform monitor is proposed which comprises a display screen and a displayprocessor. The latter being adapted to receive data representing a plurality of time-dependentcardiac waveforms, each from a different c...