Usefulness of Seismocardiography for the Diagnosis of Ischemia in Patients with Coronary Artery Disease

Korzeniowska−Kubacka, Iwona; Bilińska, Maria; Piotrowicz, Ryszard

doi:10.1111/j.1542-474x.2005.00547.x

Cited by 32 publications

(18 citation statements)

References 8 publications

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“…[5][6][7] The shapes of these waves provide information about the functional status of the heart, and therefore, many studies have used SCG to determine LV systolic and diastolic function, myocardial contractility, or to detect ischemia. [5][6][7][14][15][16][17][18] In the present study, the mechanical vibration signals were detected simply by placing the animals on the piezoelectric sensor, and therefore, CVS depended on the contact pressure of the sensor and reflects the force perpendicular to the chest wall. We consider that CVS might be a valid substitute for one axis of accelerometers to monitor the SCG signal.…”

Section: Discussionmentioning

confidence: 99%

Noninvasive Monitoring of Cardiac Preload and Contractility by Heart Beat-Derived Mechanical Vibration on the Chest Wall in Guinea Pigs

Adachi¹,

Ohba²,

Fujisawa³

et al. 2016

J.ATAMIS

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Background: Myocardial motion produces compression waves that are transmitted to the surface of the chest and vibrate the chest wall. Piezoelectric transducers, which detect mechanical vibrations, may be useful for evaluating cardiac and/or breathing movements when the sensor is placed under an animal’s body.Methods: We assessed heartbeat-related chest vibration signals (CVS) detected with a piezoelectric transducer in anesthetized guinea pigs while simultaneously monitoring the electrocardiogram, heart sounds, aortic pressure, and central venous pressure.Results: CVS displayed characteristic features as the ventricle and/or atrium contracted and relaxed during cardiac cycles. A transient positive wave, which occurred approximately at the onset of the R wave on the electrocardiogram, was followed by a profound negative wave during systole. The negative wave peaked early in systole and then gradually returned. A small notch was observed at the second heart sound. A dome-shaped positive wave was observed during diastole that connected to the transient positive wave of the next cardiac cycle. In response to phlebotomy (blood volume, 15 ml/kg), the size of the dome-shaped positive wave decreased, whereas saline transfusion (20 ml/kg) increased the positive wave during diastole. Administration of isoproterenol markedly increased the transient positive wave at the onset of systole, whereas phenylephrine affected the transient positive wave only slightly.Conclusions: Our findings suggest that CVS may be useful to identify cardiac cycles and to evaluate cardiovascular dynamics during changes in blood volume and/or cardiac contractility.

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Section: Discussionmentioning

confidence: 99%

Noninvasive Monitoring of Cardiac Preload and Contractility by Heart Beat-Derived Mechanical Vibration on the Chest Wall in Guinea Pigs

Adachi¹,

Ohba²,

Fujisawa³

et al. 2016

J.ATAMIS

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“…(Movements of the body occurring synchronously with the pulse were first reported by Gordon using an ordinary spring weighing machine in 1887 [ 3 ]). Similar methodology derived from the field of seismology is known as seismocardiography [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Force plate monitoring of human hemodynamics

Křı́ž

Šeba

2008

Nonlinear Biomed Phys

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Background: Noninvasive recording of movements caused by the heartbeat and the blood circulation is known as ballistocardiography. Several studies have shown the capability of a force plate to detect cardiac activity in the human body. The aim of this paper is to present a new method based on differential geometry of curves to handle multivariate time series obtained by ballistocardiographic force plate measurements.

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“…Further, the accelerometer employed to sense SCG can simultaneously be used in other applications such as long-term monitoring for chronic obstructive pulmonary disease (COPD) patients10, classification of breath disorders11, gait assessment for Parkinson’s disease patients12 and fall detection1314 etc. SCG finds its applications in monitoring left ventricular function during ischemia15, magnetic field compatible alternative to ECG for cardiac stress monitoring16, Diagnosis of Ischemia in Patients1718, detection of early-stage hemorrhage19 and atrial flutter20 etc.…”

mentioning

confidence: 99%

“…For instance, increased PEP and decreased LVET are shown in heart failure patients as compared to the normal subjects29. STI has been useful in numerous applications such as cardiac computed tomographic gating30, identification of exercise capacity31, optimization of cardiac resynchronization therapy in heart failure patients24, identifying extent of left ventricular (LV) muscle dysfunction24, observing changes in LV performance during haemodialysis32, mitral valve stenosis33, atrial fibrillation34, coronary artery disease35 and detection of ischemia1736 etc. Further, in the context of personal health monitoring from wearable sensors, non-invasive and unobtrusive measurement of STI can provide a quantified measure of cardiac health2428.…”

mentioning

confidence: 99%

Automatic Identification of Systolic Time Intervals in Seismocardiogram

Shafiq

Tatinati

Ang

et al. 2016

Sci Rep

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Continuous and non-invasive monitoring of hemodynamic parameters through unobtrusive wearable sensors can potentially aid in early detection of cardiac abnormalities, and provides a viable solution for long-term follow-up of patients with chronic cardiovascular diseases without disrupting the daily life activities. Electrocardiogram (ECG) and siesmocardiogram (SCG) signals can be readily acquired from light-weight electrodes and accelerometers respectively, which can be employed to derive systolic time intervals (STI). For this purpose, automated and accurate annotation of the relevant peaks in these signals is required, which is challenging due to the inter-subject morphological variability and noise prone nature of SCG signal. In this paper, an approach is proposed to automatically annotate the desired peaks in SCG signal that are related to STI by utilizing the information of peak detected in the sliding template to narrow-down the search for the desired peak in actual SCG signal. Experimental validation of this approach performed in conventional/controlled supine and realistic/challenging seated conditions, containing over 5600 heart beat cycles shows good performance and robustness of the proposed approach in noisy conditions. Automated measurement of STI in wearable configuration can provide a quantified cardiac health index for long-term monitoring of patients, elderly people at risk and health-enthusiasts.

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Usefulness of Seismocardiography for the Diagnosis of Ischemia in Patients with Coronary Artery Disease

Abstract: SCG appeared to be more sensitive for detecting ischemia caused by more than>or=50% stenosis of the main coronary artery compared to an electrocardiographic stress test. SCG was a useful ETT adjunct for selecting patients requiring coronary angiography.

Cited by 32 publications

References 8 publications

Noninvasive Monitoring of Cardiac Preload and Contractility by Heart Beat-Derived Mechanical Vibration on the Chest Wall in Guinea Pigs

Noninvasive Monitoring of Cardiac Preload and Contractility by Heart Beat-Derived Mechanical Vibration on the Chest Wall in Guinea Pigs

Force plate monitoring of human hemodynamics

Automatic Identification of Systolic Time Intervals in Seismocardiogram

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