Acoustic Cardiographic Assessment of Heart Function and the Role of Phrenic Nerve Stimulation
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In this study, the investigators sought to determine whether a stimulation of the phrenic nerve affects heart function. Heart function is assessed by acoustic cardiography.
Condition or disease
Heart Failure, CongestiveCardiac Pacing, ArtificialTranscutaneous Electric Nerve Stimulation
Procedure: Phrenic nerve stimulation
Patients who need temporary pacing following open heart surgery and who are willing to participate receive a phrenic nerve electrode during the operation. Heart function is postoperatively assessed by acoustic cardiography (Audicor, Inovise Medical Inc., Portland, USA) during different forms of pacing (right ventricle, left ventricle, biventricular; AAI, DDD) and with or without phrenic nerve stimulation. Acoustic cardiography simultaneously integrates heart sounds and single-channel electrocardiography input to generate multiple parameters that correlate to established hemodynamic measures. Effects of phrenic nerve stimulation on heart function will be analyzed.
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Layout table for eligibility information
Ages Eligible for Study:
18 Years and older (Adult, Older Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Patients following open heart surgery who need temporary pacing
Patients with permanent pacemakers
Patients with fast changing need of vasopressor therapy