Phonocardiography: Clinical use with and without combined echocardiography

Tavel, Morton E.

doi:10.1016/0033-0620(83)90028-2

Cited by 5 publications

(2 citation statements)

References 119 publications

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“…9,10 A potential tool in identifying this extra heart sound is phonocardiography, which was routinely performed in the past but has had less of a role in modern cardiac physical diagnosis. 11 We report three cases of constrictive pericarditis in which the initial referring cardiologists' physical examination did not reveal a pericardial knock. In each case, acoustic cardiography demonstrated the pericardial knock.…”

Section: Introductionmentioning

confidence: 90%

Computerized Acoustic Cardiographic Insights into the Pericardial Knock in Constrictive Pericarditis

Michaels

Viswanathan

Jordan

et al. 2007

Clinical Cardiology

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SummaryBackground: One of the clinical hallmarks of constrictive pericarditis is the pericardial knock, a high-pitched early diastolic heart sound. Making the clinical diagnosis of constrictive pericarditis is challenging, as is accurate auscultation of the pericardial knock.Hypothesis: We sought to assess the utility of a computerized acoustic cardiographic device in the assessment of the pericardial knock in patients with constrictive pericarditis.Methods: We report a case series in which computerized acoustic cardiography (Audicor, Inovise Medical Inc., Portland, OR) is performed in patients with constrictive pericarditis.Results: Three patients with constrictive pericarditis underwent computerized acoustic cardiographic recordings at the time of cardiac catheterization. In each case, initial physical examination by the internist and referring cardiologist did not appreciate a pericardial knock. Acoustic cardiography demonstrated a high-pitched early diastolic sound in each case. Time-frequency representation analyses showed the high-frequency components of the pericardial knock sound. Repeat acoustic cardiography demonstrated resolution of the pericardial knock after pericardiectomy in two patients.Conclusions: Non-invasive computerized acoustic cardiography can demonstrate the high-pitched pericardial

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Section: Introductionmentioning

confidence: 90%

Computerized Acoustic Cardiographic Insights into the Pericardial Knock in Constrictive Pericarditis

Michaels

Viswanathan

Jordan

et al. 2007

Clinical Cardiology

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“…It proved to be particularly useful for the identifica tion of different components of heart sounds because moments of closing and opening of valves can be deter mined by M-mode echocardiography [15,16]. Such a study can contribute to better understanding of the gen esis of the different components of heart sounds in rela tion to the closing and opening of heart valves.…”

Section: Mitral Valve Prolapsementioning

confidence: 99%

Investigation of Cardiovascular Sound with Esophageal Phonocardiography

Chin¹,

Vermariën²,

Vollenhoven³

et al. 1987

Am J Noninvas Cardiol

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Esophageal phonocardiography (ePCG) has the advantage that certain heart sounds are picked up near their sites of origin, whereas in conventional surface phonocardiography (sPCG) attenuation of the vibration occurs in the pathway to the microphone. The disadvantage of directional sensitivity of an accelerometer-type microphone has been eliminated by constructing biaxial microphones; with the aid of an electronic axes rotation, optimal recording of heart vibrations in the horizontal plane is achieved. ePCG has clinical value because of diagnosing mitral valve regurgitation (MR) better than conventional PCG, especially in patients having prosthetic valves in both mitral and aortic orifices where left ventricular angiography is not easily accomplished. Regarding the level of the microphone in the esophagus it has been established that various significant vibration patterns can be recorded at different heights. This variety of patterns is also explained by the distance to specific sources: heart sounds generated in the vicinity of the microphone are better detected with respect to others having a more distant origin. In this way the method contributes to the discussion about valvular components contained in the first heart sound. In the investigation simultaneous recordings with M-mode echocardiogram and pulsation curves have been obtained. More than 60 patients and normal subjects were examined. In 9 patients with prosthetic valves in both mitral and aortic orifices and 8 patients with mitral valve prolapse, MR was proved by ePCG in respectively 4 and 2 cases while sPCG failed to do so.

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Herzauskultation und Echokardiographie

Franke

1984

Allgemeine Und Spezielle Auskultation Des Herzens

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Phonocardiography: Clinical use with and without combined echocardiography

Cited by 5 publications

References 119 publications

Computerized Acoustic Cardiographic Insights into the Pericardial Knock in Constrictive Pericarditis

Computerized Acoustic Cardiographic Insights into the Pericardial Knock in Constrictive Pericarditis

Investigation of Cardiovascular Sound with Esophageal Phonocardiography

Herzauskultation und Echokardiographie

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