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PubMed · 2631841

[Flow patterns of a normally functioning monocuspid aortic prosthesis evaluated using Doppler echocardiography].

L Bernardes·J Abreu·P Matos·J M Ramos·J Quininha·S Salomão
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Abstract

STUDY OBJECTIVE: Flow analysis in normally functioning eccentric monocuspid aortic prosthetic valves, to obtain a reference data list. DESIGN: To analyse, using 2D-Doppler Echocardiography, aortic flow velocity and systolic time intervals in clinically normal patients (pts), by physical examination. SETTING: Referred pts to the Echocardiographic Laboratory at Santa Marta Hospital--HCL. PATIENTS: Sequential sample of 61 pts with aortic prosthesis (41 Bjork-Shiley and 20 Hall-Kaster) without clinical evidence of either cardiac failure or significant aortic regurgitation. Patients with bad quality record were also excluded. INTERVENTIONS: Doppler Echocardiography was used to record transaortic flow, and the following indexes were analysed: instantaneous peak velocity (pv) and gradient (pg), presence of regurgitation, systolic time intervals and both preejection period/ejection time (PEP/ET) and acceleration time/ejection time (AT/ET). RESULTS: Pv ranged from 1.1 to 4 m/sec (mean 2.4 +/- 0.2. The prosthesis size 19 and 21 showed a greater pg compared to the larger ones: 46.3 +/- 14.4 mmHg against 12.6 +/- 6.4 mmHg (p less than 0.001). Occasionally a pg over 50 mmHg was found in the prosthesis size 19 and 21. The correlation between prosthesis size and pg was also significant (r = -0.62; p less than 0.001). PEP interval was 60 +/- 10 milisec in prosthesis no. 19 and 90 +/- 13 milisec in no. 27 (p less than 0.01). AT ranged from 77 +/- 14 to 88 +/- 14 milisec (mean 82 +/- 13). ET was 294 +/- 5.4 milisec in valves size 19 and 257 +/- 34 millisec in no. 25 (p less than 0.05); there was also a significant difference between prosthesis size 19 and 27 (p less than 0.05). Mild regurgitation was detected in 32.7% of cases. CONCLUSIONS: These data may be particularly useful as reference values to the follow-up of pts these types of prosthesis. Significant differences were found in pg between different valve sizes and this should be remembered when proceeding to standard evaluation by 2D-Doppler Echocardiography. Regurgitation is frequently detected in normally functioning prosthesis, not deeper than 2 cm in the left ventricle.

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AdultAgedAortic ValveBlood Flow VelocityCoronary CirculationEchocardiography, DopplerFemaleHeart Valve ProsthesisHumansMaleMiddle AgedReference ValuesEnglish AbstractJournal Article

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L Bernardes, J Abreu, P Matos, J M Ramos, J Quininha, S Salomão. 1989. [Flow patterns of a normally functioning monocuspid aortic prosthesis evaluated using Doppler echocardiography].. https://pubmed.ncbi.nlm.nih.gov/2631841/

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