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1.
Arch. cardiol. Méx ; 78(2): 195-209, abr.-jun. 2008.
Article in Spanish | LILACS | ID: lil-567648

ABSTRACT

At the beginning of the evaluation of Coronary Artery Disease (CAD), Coronary Multidetector Computed Tomography (MDCT) was exclusively used to detect calcified plaques in coronary arteries through the Calcium Score, whose value by itself is limited. Nowadays, thanks to the technological advancements, potential clinical applications, with this method, include detection of coronary arterial stenosis, assessment of coronary bridges, and evaluation of anomalous coronaries. The intraluminal coronary stent evaluation is not possible yet, but this might become possible with the new-generation scanners. At the moment, the published results seem to be promising, nonetheless, the enthusiasm generated by this method should be accompanied by adequate training, as well as by its validation and certification.


Subject(s)
Humans , Coronary Angiography/methods , Tomography, X-Ray Computed , Coronary Stenosis , Coronary Vessel Anomalies , Coronary Vessels , Stents
2.
Arch. cardiol. Méx ; 78(2): 139-147, abr.-jun. 2008.
Article in Spanish | LILACS | ID: lil-567654

ABSTRACT

Hypercholesterolemia prompts to endothelial dysfunction (ED) and ED predisposes to atherogenesis. ED appears early in the course of atherogenesis and it is considered a coronary artery disease (CAD) marker. OBJECTIVES: To assess endothelial function (EF) using Positron Emission Tomography (PET) in asymptomatic patients with recent dyslipidemia diagnosis and without history of ischemic heart disease and previous hypolipemiant treatment. MATERIAL AND METHODS: Fourteen asymptomatic patients with recent dyslipidemia diagnosis (< 6 months) were studied by obtaining a lipid profile, blood glucose, and a three phase 13N-ammonia PET scan: rest, cold pressor test (CPT) and pharmacologic stress with adenosine. EF was assessed by calculating the coronary flow reserve (CFR), endothelial-dependant vasodilatation index (EDVI), and coronary blood flow increase percentage in CPT (% Delta CF). RESULTS: 79% of patients with dyslipidemia had ED and all their values were lower than those previously published as normal: rest coronary flow 0.44 +/- 0.12 vs 0.57 +/- 0.147 (p = 0.002), CPT coronary flow 0.57 +/- 0.17 vs 0.88 +/- 0.26 (p = 0.001), stress coronary flow 1.24 +/- 0.05 vs 1.81 +/- 0.35 (p = 0.005), EDVI 1.28 +/- 0.25 vs 1.53 +/- 0.24 (p 0.017), CRF 2.79 +/- 0.94 vs 3.15 +/- 0.48 (p 0.198) and % Delta CF 29.08 +/- 24.62% vs 53 +/- 24.60% (p 0.022). Conclusions: Asymptomatic patients in early stages of dyslipidemia showed a greater ED prevalence that was detected by 13N-ammonia PET scan.


Subject(s)
Adult , Female , Humans , Male , Middle Aged , Endothelium, Vascular , Endothelium, Vascular , Hypercholesterolemia , Hypercholesterolemia , Positron-Emission Tomography , Case-Control Studies , Cross-Sectional Studies , Prospective Studies
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