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CURRENT ISSUETHE JOURNAL OF CARDIOVASCULAR SURGERY

A Journal on Cardiac, Vascular and Thoracic Surgery

Indexed/Abstracted in: BIOSIS Previews, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,632

Frequency: Bi-Monthly

ISSN 0021-9509

Online ISSN 1827-191X

 

The Journal of Cardiovascular Surgery 2002 October;43(5):603-7

CARDIAC SECTION 

    ORIGINAL ARTICLES

Prediction of improvement in regional left ventricular function after coronary artery bypass grafting: quantitative stress-redistribution 201Tl imaging in detection of myocardial viability

Imamaki M., Maeda T., Tanaka S., Sugawara Y., Shimakura T.

Department of Cardiovascular Surgery Fukuyama Cardiovascular Hospital, Fukuyama, Japan

Background. This ­study inves­ti­gat­ed the use­ful­ness of quan­ti­ta­tive assess­ment of Thallium-201 ­stress redis­tri­bu­tion myo­car­dial scin­tig­ra­phy com­bined ­with quan­ti­ta­tive assess­ment of region­al ­left ven­tric­u­lar func­tion ­using the cen­ter­line meth­od for pre­dict­ing of recov­ery region­al ­left ven­tric­u­lar func­tion fol­low­ing myo­car­dial revas­cu­lar­iza­tion.
Methods. Twenty ­patients ­with chron­ic ­total obstruc­tion of the prox­i­mal por­tion of ­left ante­ri­or descend­ing ­artery and/or ­right cor­o­nary ­artery ­were stud­ied. Percent Tl-­uptake meth­od was ­used to eval­u­ate myo­car­dial viabil­ity ­before ­CABG. Regional LV func­tion was eval­u­at­ed ­before and ­after ­CABG ­with the cen­ter­line meth­od. The ter­ri­to­ry of LAD was ­defined by ­chords 10 to 58 and ­that of RCA was ­defined by ­chords 59 to 80 in the cen­ter­line meth­od. The param­e­ter of region­al ­left ven­tric­u­lar func­tion was the ­mean (SF-Av.)/SD of ­each LAD and RCA ter­ri­to­ry.
Results. In cas­es show­ing a % ­uptake val­ue ­under 50%, the pre­op­er­a­tive val­ue of (SF-Av.)/SD was -3.18±0.74 and post­op­er­a­tive val­ue was -2.63±0.8 1. The dif­fer­ence ­between ­these val­ues was not sig­nif­i­cant. When the %­uptake val­ue ­over 50%, the pre­op­er­a­tive val­ue of (SF-Av.)/SD was -2.80±0.49 and the post­op­er­a­tive val­ue was -2.27±0.28. The post­op­er­a­tive val­ue was sig­nif­i­cant­ly high­er ­than the pre­op­er­a­tive val­ue(p=0.007).
Conclusions. Even in cas­es of ­severe ­left ven­tric­u­lar dys­func­tion, region­al ­left ven­tric­u­lar func­tion ­improved if the val­ue of % ­uptake in the redis­tri­bu­tion Thallium imag­ing was 50% or ­over. Quantitative anal­y­sis of myo­car­dial scin­tig­ra­phy com­bined ­with quan­ti­ta­tive anal­y­sis of ­left ven­tric­u­log­ra­phy is a use­ful meth­od for pre­dict­ing recov­ery of region­al ­left ven­tric­u­lar func­tion fol­low­ing myo­car­dial revas­cu­lar­iza­tion.

language: English


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