Relative adrenal insufficiency: an identifiable entity in nonseptic critically ill patients?

OBJECTIVE: To determine whether relative adrenal insufficiency (RAI) can be identified in nonseptic hypotensive patients in the intensive care unit (ICU). DESIGN: Retrospective study in a medical-surgical ICU of a university hospital. PATIENTS: One hundred and seventy-two nonseptic ICU patients (51% after trauma or surgery), who underwent a short 250 microg ACTH test because of > 6 h hypotension or vasopressor/inotropic therapy. MEASUREMENTS: On the test day, the Simplified Acute Physiology Score II (SAPS II) and Sequential Organ Failure Assessment (SOFA) score were calculated to estimate disease severity. The ICU mortality until day 28 was recorded. Best discriminative levels of baseline cortisol, increases and peaks were established using receiver operating characteristic curves. These and corticosteroid treatment (in n = 112, 65%), among other variables, were examined by multiple logistic regression and Cox proportional hazard regression analyses to find independent predictors of ICU mortality until day 28. RESULTS: ICU mortality until day 28 was 23%. Nonsurvivors had higher SAPS II and SOFA scores. Baseline cortisol levels correlated directly with albumin levels and SAPS II. In the multivariate analyses, a cortisol baseline > 475 nmol/l and cortisol increase < 200 nmol/l predicted mortality, largely dependent on disease severity but independent of albumin levels. Corticosteroid (hydrocortisone) treatment was not associated with an improved outcome, regardless of the ACTH test results. CONCLUSION: In nonseptic hypotensive ICU patients, a low cortisol/ACTH response and treatment with corticosteroids do not contribute to mortality prediction by severity of disease. The data thus argue against RAI identifiable by cortisol/ACTH testing and necessitating corticosteroid substitution treatment in these patients.     

Optimal treatment of dyslipidemia in high-risk patients: intensive statin treatment or combination therapy?

A recent update to the National Cholesterol Education Program's Adult Treatment Panel III guidelines suggests low-density lipoprotein cholesterol (LDL-C) goals of <70 mg/dL in very-high-risk patients and <100 mg/dL in high-risk patients. Currently available 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors (statins) are not equal in their ability to lower LDL-C, and it is unlikely that the substantial LDL-C reductions that are often needed in high-risk persons can be achieved with starting doses of some of the older statins. Possible alternatives in such cases include the use of high-dose statin therapy, a more efficacious statin, or combination therapy. Recent clinical data have demonstrated a greater likelihood of coronary heart disease event reduction with aggressive statin therapy that lowers LDL-C in a robust fashion (>30%-40%) than with moderate therapy. Until data from ongoing trials of combination therapy are available, however, monotherapy with a potent statin should be initiated to lower LDL-C. Nonetheless, for residual elevation in triglycerides and/or reduced high-density lipoprotein cholesterol, adding a second agent (eg, fenofibrate, niacin) is a reasonable option.     

Myelolipomatous foci in an adrenal adenoma causing Cushing's syndrome?

We present a case of Cushing's syndrome in a 60-year old man. Abdominal imaging revealed a right adrenal mass. After confirmation of the diagnosis, the right adrenal gland was resected and revealed a tumor containing a combined myelolipoma and adenoma of the adrenal gland. After surgical removal of the adrenal mass, the symptoms and clinical signs of Cushing's syndrome resolved gradually. Immunohistochemical analysis of the adrenal adenoma specimens showed a high lymphocyte population, particularly within the myelolipoma, and an unusually marked intermingling of myelolipomatous and adrenocortical tumor cells. Adrenocortical clear cells were found in direct contact with T and B lymphocytes. Immune-endocrine mechanisms may have triggered the corticotropin-independent adrenal Cushing's syndrome in this patient.     

Speckle tracking analysis in intensive care unit: A toy or a tool?

The use of conventional echocardiography in the intensive care unit (ICU) is today established to assess left and right ventricular systolic function, for preload determination and procedural guidance. Next step in ICU echocardiography could be the use of novel ultrasound techniques such as strain echocardiography to assist in the management of patients with acute coronary syndrome, heart failure, or pulmonary embolism. This review has gathered the available evidence supporting the incremental value of strain in the diagnostic workup of cardiac diseases treated in ICU.