After studying 109 placentas from normal pregnancies to term, fulfilled entirely in height (Juliaca, 12,000 feet above sea level), and 100 of sea level (Lima), the results - prior rigorous statistical control - can be summarized as follows: height it found: a) A significant preponderance of "other forms" of placenta, besides round or oval; b) rounded placentas were thicker than those in the group "other forms"; c) it showed oval shape stability proportions. These trends increase with higher age and parity of mother. At sea level there is a relationship between the central insertion of the umbilical cord and newborns of greater weight and size. At altitude, the lack of relationship between cord insertion and weight of newborn means that other factors control the weight of the newborn in hypoxic conditions. At altitude, a significant predominance central cord insertion is present in matern...

After studying 109 placentas from normal pregnancies to term, fulfilled entirely in height (Juliaca, 12,000 feet above sea level), and 100 of sea level (Lima), the results - prior rigorous statistical control - can be summarized as follows: height it found: a) A significant preponderance of "other forms" of placenta, besides round or oval; b) rounded placentas were thicker than those in the group "other forms"; c) it showed oval shape stability proportions. These trends increase with higher age and parity of mother. At sea level there is a relationship between the central insertion of the umbilical cord and newborns of greater weight and size. At altitude, the lack of relationship between cord insertion and weight of newborn means that other factors control the weight of the newborn in hypoxic conditions. At altitude, a significant predominance central cord insertion is present in matern...

Objective. To evaluate the predictive ability of traditional risk scores and frailty assessment for 30-day mortality in elderly patients undergoing cardiac surgery. Materials and Methods. A single-center retrospective cohort study was conducted, including elderly patients (≥75 years old) who underwent cardiac surgery between January 2005 and December 2015. EuroSCORE II, STS (Society of Thoracic Surgeons) score, Charlson Comorbidity Index, and Electronic Frailty Index scores were calculated to assess their predictive ability for 30-day mortality using receiver operating characteristic (ROC) curves and corresponding areas under the curve (AUC). Results. A total of 203 patients were included during the study period, of whom 33% underwent isolated coronary bypass surgery. The overall 30- day mortality rate was 17.6%. Patients who died within the first 30 days exhibited higher scores on Eur...