Frequency analysis of heart murmurs

Vollenhoven, E. Van; Rotterdam, A. van; Dorenbos, T.; Schlesinger, F. G.

doi:10.1007/bf02474179

Cited by 16 publications

(2 citation statements)

References 2 publications

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“…[2][3][4][5][6][7][8][9][10] Since a harsh systolic murmur is the mostconstant clinical sign of aortic stenosis, inherent characteristics of the murmur including frequency, pitch, timing, and quality have been studied. [11][12][13] A previous study 3 that utilized spectral analyses for the assessment of severity has shown that dominant frequencies contained within the heart murmur are related to instantaneous jet velocities distal to the obstruction in stenotic cardiac lesions. Other investigators have used frequency analysis to estimate the severity of aortic stenosis.…”

mentioning

confidence: 99%

Assessment of Severity of Aortic Stenosis Through Time-Frequency Analysis of Murmur *

Kim¹,

Tavel²

2003

Chest

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confidence: 99%

Assessment of Severity of Aortic Stenosis Through Time-Frequency Analysis of Murmur *

Kim¹,

Tavel²

2003

Chest

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“…19 The frequency/intensity characteristics are selected by filters, diastolic rumbles being contained in the low band (25-100 Hz), functional systolic murmurs in the medium band , and diastolic murmurs, opening snaps and most systolic murmurs in the high band (100-800 Hz). 20 By focusing an external ultrasonic beam onto appropriate parts of the cardiac system, such as along the aorta or pulmonary artery, the flow of blood through them may be detected. Both A-and B-scan techniques are used for this and for observing movements of the cardiac valves and muscle.…”

Section: Heart Soundsmentioning

confidence: 99%

Biomedical engineering

Perkins¹

1971

Proc. Inst. Electr. Eng. UK

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The increasing sophistication of modern technology and its widening areas of application have established the need for multidisciplinary activities, and biomedical engineering is a typical example of this trend. The evolution of the subject from the engineering approach of earlier biomedical workers is described, and some of the lessons learned before and during the transition are considered. An approach to this now rather extensive subject is made by separating the application to biomedical research from that to clinical medicine, The research section is stratified according to the level of biological organisation with which it is concerned, that is, from the molecular systems of biochemistry to the organ systems of physiology. At each level, sufficient background is given to show the relevance of biomedical engineering, and this approach is continued with the clinical applications, which are considered within conventional medical categories. The principal contribution to medicine is found to lie with the innovation of the new methods made possible by advancing technology. The more recent technological ideas of organ and function replacement are discussed followed by that of computer usage in various areas of biomedicine. In conclusion, a critical assessment of present achievements is attempted, and the possible future of biomedical engineering is discussed.

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