Simplified detection of myocardial ischemia by seismocardiography. Differentiation between causes of altered myocardial function

Herz. 2014 Aug;39(5):586-92. doi: 10.1007/s00059-013-3851-x. Epub 2013 Jun 23.

Abstract

Seismocardiography (SCG) is a noninvasive technique for recording cardiac vibrations. Changes in these waves have been correlated with chronic and acute alterations in myocardial function. This analysis is complex and clinical integration limited. The current study aimed to simplify the utilization of SCG by fast Fourier transformation for a reliable discrimination between different intra- and postoperative causes of hypotension (i.e., myocardial ischemia or hypovolemia). We operated on nine pigs and recorded SCG at baseline, at hypovolemia (occlusion of the inferior vena cava), and at ischemia (occlusion of the right coronary artery). In conclusion, SCG enables detection and differentiation of ischemia and hypovolemia as important causes of altered myocardial function during and after surgery. Thus, this simple and noninvasive diagnostic tool may be used intra- and postoperatively to identify patients at risk.

MeSH terms

  • Animals
  • Ballistocardiography / methods*
  • Diagnosis, Differential
  • Disease Models, Animal
  • Electrocardiography / methods*
  • Fourier Analysis
  • Heart Rate / physiology
  • Hemodynamics / physiology
  • Myocardial Contraction / physiology*
  • Myocardial Ischemia / diagnosis*
  • Myocardial Ischemia / etiology
  • Myocardial Ischemia / physiopathology*
  • Postoperative Complications / diagnosis
  • Postoperative Complications / etiology
  • Postoperative Complications / physiopathology
  • Swine
  • Ventricular Dysfunction, Left / diagnosis*
  • Ventricular Dysfunction, Left / etiology
  • Ventricular Dysfunction, Left / physiopathology*