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Feasibility of Coronary Flow
Measurements by Transthoracic
Doppler Echocardiography in an
Every- Day Practice Echo-Laboratory

Lowenstein, Jorge;
Tiano, Cristian; Presti, Cecilia

Sanatorio Agote and Sanatorio Mitre, Buenos Aires, Argentina

The aim of this study was to evaluate the feasibility of the measurements of coronary flow velocities (CFV) in the distal left anterior descending coronary artery (LAD) by transthoracic Doppler echocardiography (TTE) in a large unselected population of patients

Methods: We performed 1060 consecutive pulsed Doppler TTE (4-7 MHz transducer, color map with a Nyquist scale average of 19.2cm), without any contrast agent ( 675 men, mean age: 64.7 ± 11 years). The baseline systolic (BSV) and diastolic velocities (BDV) were measured in the distal LAD.

Results: An interpretable Doppler diastolic signal was obtained in 972 /1060 (91.7%) of the determinations with an average BDV of 28.4 ± 9.7cm/s and a systolic spectral imaging in 757 / 1060 (71.4 %) with a BSV of 15.4 ± 6 cm/s The average performing time was 50 seconds ± 112 seconds .The population of the patients in which it was not feasible to determine Doppler recording of the BDV presented a lower mean left mass than the feasible group (297 gr. + 23 vs 314.9 gr + 27 , p= 0.001) and a higher percentage of occluded LAD among the coronariographied pts (72 vs 6.7 %, p<0.0001); there were no differences in the patients' age, gender, height, weight, left diastolic ventricular diameter, and 2-dimentional echo window quality between the feasible and the non feasible studies.

Conclusion: In the daily practice, assessment of diastolic coronary flow velocities by transthoracic Doppler echocardiography in the LAD territory is a feasible short- time consuming technique; The feasibility is higher in patients with ventricular hypertrophy and limited in patients with total occluded LAD.

 

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2nd Virtual Congress of Cardiology

Dr. Florencio Garófalo
Steering Committee
President
Dr. Raúl Bretal
Scientific Committee
President
Dr. Armando Pacher
Technical Committee - CETIFAC
President
fgaro@fac.org.ar
fgaro@satlink.com
rbretal@fac.org.ar
rbretal@netverk.com.ar
apacher@fac.org.ar
apacher@satlink.com

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