Farzad Khosrow-Khavar

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BACKGROUND AND OBJECTIVE This paper introduces a seismocardiography based methodology of predicting the start and the end of diastole to be used in diastolic timed vibrations (DTV), which provides non-invasive emergency treatment of acute coronary thrombosis by applying direct mechanical vibrations to the patient chest during diastole of heart cycles. It is(More)
Seismocardiogram (SCG) is the low-frequency vibrations signal recorded from the chest using accelerometers. Peaks on dorsoventral and sternal SCG correspond to specific cardiac events. Prior research work has shown the potential of extracting such peaks for various types of monitoring and diagnosis applications. However, annotation of these peaks is not a(More)
This paper presents and evaluates preferred patterns of vibrations and active breaking techniques for the Diastolic Timed Vibrator (DTV). DTV uses low frequency mechanical vibrations applied to the chest to help in clot dissolution in pre-hospitalization treatment of acute coronary ischemia. In this work, we argue that random and ramp type vibration(More)
An algorithm based on the combination of electrocardiography (ECG) and seismocardiogranphy (SCG) is used to detect the start and the end of diastole in diastolic timed vibrations (DTV). The proposed algorithm uses the ECG-R wave as the reference point and detects the aortic valve closure (AC) and mitral valve closure (MC) points of the SCG signal. This(More)
OBJECTIVE The purpose of this research was to design a delineation algorithm that could detect specific fiducial points of the seismocardiogram (SCG) signal with or without using the electrocardiogram (ECG) R-wave as the reference point. The detected fiducial points were used to estimate cardiac time intervals. Due to complexity and sensitivity of the SCG(More)
We propose a hidden Markov model approach for processing seismocardiograms. The seismocardiogram morphology is learned using the expectation-maximization algorithm, and the state of the heart at a given time instant is estimated by the Viterbi algorithm. From the obtained Viterbi sequence, it is then straightforward to estimate instantaneous heart rate,(More)
Delay in restoration of vessel patency after coronary infarction is a major factor affecting the survival rate of heart attack patients and the amount of myocardial muscle death. To this end, we propose Arterial Deformation Accelerated Reperfusion (ADAR), a treatment method that can be initiated immediately after the onset of symptoms in the feld by a(More)
A seismocardiography based methodology is introduced for predicting the start and the end of diastole to be used in diastolic timed vibrations. An accelerometer was placed on the sternum of 142 participants (120 healthy and 22 ischemic heart patients) to record Seismocardiogram (SCG). It is claimed that SCG, in combination with electrocardiogram (ECG),(More)