Heart Failure Clinical Trial
Official title:
The Connection Between Mechanical Alternans Measured by Pressure-Volume (PV) Loop Catheter in Patients With Ischemic Heart Failure and the Occurrence of Microvolt T Wave Alternans (MTWA)
The main objective is to investigate mechanical alternans and MTWA in patients with heart failure caused by coronary artery disease to demonstrate a possible correlation between these two phenomena.
In patients with severe heart failure and aortic valve disease mechanical alternans or
pulsus alternans (a condition in which there is a beat-to-beat oscillation in the strength
of cardiac muscle at a constant heart rate) is observed.
The mechanisms linking mechanical to electrophysiological dysfunction in heart failure are
still under investigation, but impaired calcium cycling is the most striking abnormality of
failing myocytes, and is most responsible for contractile dysfunction. Yet it remains
unclear how this influences susceptibility to arrhythmias.
The MTWA is suggested as a risk marker to identify high risk patients for potential VTEs but
the underlying mechanism is not completely understood. The aim of this study is to
investigate this in a clinical setting by measuring LV parameters using a PV loop
conductance catheter and generate TWA recording simultaneously to demonstrate a possible
correlation between these two phenomena in patients with ischemic heart failure and find out
if MTWA could turn into a more valuable risk factor.
Our hypothesis is that alternating changes in LV filling explains the electrocardiogenesis
of TWA by changing the position of the heart relative to the body surface electrodes in an
alternating way.
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Observational Model: Case-Only, Time Perspective: Prospective
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