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A CFD-FFT approach to hemoacoustics that enables degree of stenosis prediction from stethoscopic signals.
Heliyon
July 2023
Department of Mechanical Engineering, The American University in Cairo, 11835 New Cairo, Egypt.
In this paper, we identify a new (acoustic) frequency-stenosis relation whose frequencies lie within the recommended auscultation threshold of stethoscopy (< 120 Hz). We show that this relation can be used to extend the application of phonoangiography (quantifying the degree of stenosis from bruits) to widely accessible stethoscopes. The relation is successfully identified from an analysis restricted to the acoustic signature of the von Karman vortex street, which we automatically single out by means of a metric we propose that is based on an area-weighted average of the Q-criterion for the post-stenotic region.
View Article and Find Full Text PDFAssociation between phonocardiography and echocardiography in heart failure patients with preserved ejection fraction.
Eur Heart J Digit Health
January 2023
Department of Physiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Universiteitssingel 50, 6229 ER Maastricht, The Netherlands.
Aims: Heart failure with preserved ejection fraction (HFpEF) is associated with stiffened myocardium and elevated filling pressure that may be captured by heart sound (HS). We investigated the relationship between phonocardiography (PCG) and echocardiography in symptomatic patients suspected of HFpEF.
Methods And Results: Consecutive symptomatic patients with sinus rhythm and left ventricular ejection fraction >45% were enrolled.
Serial Electrocardiographic Changes in Early Post-myocardial Infarction Pericarditis.
Cureus
July 2022
Cardiology, YuuAi Medical Center, Tomigusuku, JPN.
A 72-year-old man developed fever and chest pain, accompanied by an increase in C-reactive protein, four days after successful emergency catheter intervention for an acute wide anterior myocardial infarction (MI). A twelve-lead electrocardiogram (ECG) showed marked ST elevation in leads V1-6, I, and aVL, with reciprocal ST depression in leads II, III, and aVF. Although these ECG changes improved by day three, he developed fever and chest pain on day four, and an ECG at this timepoint showed ST elevation in leads II, III, aVF, and mild worsening of the ST elevation in the anterolateral leads, indicating diffuse ST-segment elevation consistent with acute pericarditis.
View Article and Find Full Text PDFHeart Murmurs in Children: Evaluation and Management.
Am Fam Physician
March 2022
Navy Medicine Readiness and Training Command, Camp Pendleton, CA, USA.
Up to 8.6% of infants and 80% of children have a heart murmur during their early years of life. The presence of a murmur can indicate conditions ranging from no discernable pathology to acquired or congenital heart disease.
View Article and Find Full Text PDFNovel Approach to Assess Cardiac Function Using Systolic Performance and Myocardial Performance Indices From Simultaneous Electrocardiography and Phonocardiography Recordings in Dogs With Various Stages of Myxomatous Mitral Valve Disease.
Front Vet Sci
October 2021
Department of Physiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand.
Myxomatous mitral valve disease (MMVD) progression entails changes in the structural and functional properties of the heart affecting cardiac timings and intervals within the cardiac cycle. Conventionally, echocardiography is used to determine the cardiac time intervals (CTIs) including systolic and myocardial performance indices (SPI and MPI) in evaluating cardiac function. Alternatively, these CTIs can also be measured using simultaneous recordings of electrocardiography (ECG) and phonocardiography (PCG), but their values in different MMVD stages remain to be established.
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