Abstract

MARTIRE, Víctor et al. Carotid vascular disease as a marker of inducible ischemia in asymptomatic patients with multiple risk factors. Rev.Urug.Cardiol. [online]. 2015, vol.30, n.3, pp.286-294. ISSN 0797-0048.

Background: the value of the carotid intima-media thickness (IMT) as a long-term risk marker for cardiovascular events and the correlation between carotid plaques (CP) and coronary anatomy (SYNTAX score) have been well demonstrated. There is little evidence about the incidence of myocardial ischemia depending on the different degrees of severity of the carotid artery disease (CAD). Objective: to assess the incidence and severity of inducible myocardial ischemia in patients (P) with different degrees of CAD, using quantitative data of Carotid Doppler (CD) and of the functional study of radioisotope myocardial perfusion (SPECT). Materials and methods: they were included 397 consecutive asymptomatic patients were followed up, 251 males, average age of 65 ± 9 years old, with cardiovascular risk factors and Framingham score ³  15, patients were studied by CD and SPECT and divided into 5 groups (G) according to plaque score (PS). G1 (control, n: 50): with no carotid alterations: carotid intima media: <1,1 mm; G2 (n: 150): with thickening of IMT: PS: ³1,1-<1,5 mm; G3 (n: 88): PS: ³1,5-<6 mm, G4 (n: 62): PS: ³6-<12 mm; G5 (n: 47): PS: ³12 mm. Determination of ischemic incidence in each group, correlation (r) between PS by means of CDE with summed difference score (SDS) by means of SPECT and ROC curve. Results: from the total of 397 P, 169 (42%) developed ischemia under SPECT. For each group: G1:14 (28%), G2:41 (26%), G3:30 (34%), G4:45 (72%) *, G5:39 (83%) *. Correlation: r=PS/SDS: G1:0.13.  G2:0.23.  G3:0.25. G4:0.47 *. G5:0.65 *. (* = p: <0.01). ROC curve: 0.72 ± 0.04 (PS cutting line: 6 mm). Conclusion: the amount of carotid vascular disease correlated with a high incidence and severity of inducible myocardial ischemia. This finding reinforces their clinical marker value to additional risk scores available today.

Keywords : MYOCARDIAL ISQUEMIA; MYOCARDIAL PERFUSION IMAGING; RISK FACTORS; CAROTID INTIMA-MEDIA THICKNESS.

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