Archivos de cardiología de México
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Our aim was to evaluate the effect of the baroreflex mechanism upon peripheral blood volume during sympathetic stimulation by orthostatism. ⋯ The sequence method showed a strong baroreflex effect upon peripheral blood volume that became more apparent during sympathetic stimulation with orthostatism. This approach could be clinically useful for the evaluation of blood volume regulation for many diseases such as diabetes mellitus and heart failure, and during therapeutic interventions such as hemodialysis.
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Latin America has dramatically increased the number of articles Publisher from 1995 to 2002, but the individual contribution of each country appears to be very unequal. ⋯ The scientific production in Cardiology from Latin America shows dramatic differences among the countries, and Brazil, Mexico, and Argentina alone provide 80% of the publications. Brazil seems to have led the region for 20 years, especially since 1998. From the quality of the articles point of view, considering the impact factor, Chile and Argentina appear to be better positioned.
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We sought to analyze exercise-derived mean pulmonary artery pressure (Mpap) - cardiac index (CI) - relationship to expand the concepts regarding its nature and to better identify pulmonary hemodynamic responders to acute oxygen breathing (AOB - 99.5%) in pulmonary hypertension (PH) - COPD patients. ⋯ When exercise derived mPAP/CI is analyzed, valuable information for linearpulmonary vascular resistance - (LPVR) could be obtained for PH - COPD patients. mPAP/CI abnormalities not always reflect "pure arteriolar" increased LPVR for all PH-COPD patients. Hemodynamic benefit on the pulmonary circulation and right ventricular afterload could be expected with long-term oxygen therapy in resting <30 mmHg mPAP-PH-COPD patients.
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To define the predictive factors of electrical storm (ES) in patients with Chronic Chagas Heart Disease (CCh) with an implantable cardioverter defibrillator (ICD). ⋯ In subjects with CCh with an ICD, the following variables are predictive of arrhythmic storm: EF <35%, NYHA functional class III-IV and absence of beta-blocker treatment.