Clin Invest Med 2007; 30 (2): E103-E107. AbstractPurpose: Stress has been shown to cause a large range of adverse fetal effects. This pilot study is the first attempt to examine cortisol level in the hair of pregnant women and assess its potential as a biomarker of gestational stress. Patients and Methods: Twenty-five healthy pregnant women, in whom hair cortisol levels and the Perceived Stress Scale (PSS) were measured and correlated. Results: Maternal hair cortisol levels, ranging between 0.06 and 0.23 nmol/g of hair correlated positively and significantly with measures of perceived stress (ranging between 2-22); (Rs=0.47) (P<.05). Conclusions: Our findings corroborate recent primate studies with induced stress, and suggest that hair cortisol is a potential biomarker of chronic stress in pregnancy. This new long term biological marker may have important implications in research and clinical practice.

Background: In ST-segment–elevation myocardial infarction (STEMI), infarct size correlates directly with heart failure and mortality. Preclinical testing has shown that, in comparison with reperfusion alone, mechanically unloading the left ventricle (LV) before reperfusion reduces infarct size and that 30 minutes of unloading activates a cardioprotective program that limits reperfusion injury. The DTU-STEMI pilot trial (Door-To-Unload in STEMI Pilot Trial) represents the first exploratory study testing whether LV unloading and delayed reperfusion in patients with STEMI without cardiogenic shock is safe and feasible. Methods: In a multicenter, prospective, randomized exploratory safety and feasibility trial, we assigned 50 patients with anterior STEMI to LV unloading by using the Impella CP followed by immediate reperfusion (U-IR) versus delayed reperfusion after 30 minutes of unloading (U-DR). The primary safety outcome was a composite of major adverse cardiovascular and cerebrovascular events at 30 days. Efficacy parameters included the assessment of infarct size by using cardiac magnetic resonance imaging. Results: All patients completed the U-IR (n=25) or U-DR (n=25) protocols with respective mean door-to-balloon times of 72 versus 97 minutes. Major adverse cardiovascular and cerebrovascular event rates were not statistically different between the U-IR versus U-DR groups (8% versus 12%, respectively, P =0.99). In comparison with the U-IR group, delaying reperfusion in the U-DR group did not affect 30-day mean infarct size measured as a percentage of LV mass (15±12% versus 13±11%, U-IR versus U-DR, P =0.53). Conclusions: We report that LV unloading using the Impella CP device with a 30-minute delay before reperfusion is feasible within a relatively short time period in anterior STEMI. The DTU-STEMI pilot trial did not identify prohibitive safety signals that would preclude proceeding to a larger pivotal study of LV unloading before reperfusion. An appropriately powered pivotal trial comparing LV unloading before reperfusion to the current standard of care is required. Clinical Trial Registration: URL: https://www.clinicaltrials.gov . Unique identifier: NCT03000270.