[The importance of myocardial blood flow quantification with positron emission tomography (PET) in patients with three-vessel disease].

The study of patients with coronary artery disease by means of gated SPECT has been well established. One of the major limitations of this technique is the detection of myocardial perfusion defects in the presence of multivessel or three-vessel coronary artery disease due to balanced ischemia. Quantification of myocardial blood flow by positron emission tomography allows not only to study cardiac perfusion and function but also to determine the coronary flow reserve which has a better correlation with significant stenosis in patients with trivascular disease.

[Renal sympathetic denervation (RSD): a new, non-pharmacologic therapeutic strategy for treatment-resistant hypertension (TRH). Report of the first procedure in Mexico].

A patient with resistant hypertension successfully treated with sympathetic renal denervation (SRD) is reported. This novel therapy is based on the partial ablation of the renal nerves by applying radiofrequency to the luminal surface of the renal arteries using vascular catheterization techniques. This first case performed in Mexico has two particular features: (i) an electrophysiology ablation catheter was employed due to the unavailability of the system specifically designed for SDR, and (ii) under current denervation protocols, the anatomical complexity of the targeted renal arteries would have excluded our patient from this procedure and thus deprived her of the benefit provided.

[PET evaluation of inflammatory process in Takayasu's arteritis].

Objective: To determine the application of PET in monitoring patients with Takayasu's arteritis (TA) with Inflammatory activiti (IA) and this correlation with established clnical criteria.

Methods: 35 patients diagnosed with TA were enrolled. Determination of erythrocyte sedimentation rate, C -reactive protein, fibrinogen and a complete blood count was performed and clinical criteria of activity were applied.

[Endothelial function assessment by positron emission tomography in patients with hypercholesterolemia].

Unlabelled: 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.