Systolic time interval v heart rate regression equations using atropine: reproducibility studies.

Estimating Rate Equations Using Nonparametric Regression Methods

Heart rate variability reproducibility during exercise.

The use of heart rate variability (HRV) parameters during exercise is not supported by appropriate reliability studies. In 80 healthy adults, ECG was recorded during three 6 min bouts of exercise, separated by 6 min of unloaded cycling. Two bouts were at a moderate intensity while the final bout was at a heavy exercise intensity. This protocol was repeated under the same conditions on three occ...

Correlation between low T3 syndrome and mortality rate in patients with systolic heart failure

Introduction: This study was performed to evaluate the prevalence of low T3 syndrome among patients with heart failure and to assess the correlation between decreased level of tri iodothyronin (T3) with mortality rate. Methods: In a prospective cross-sectional study, 91 patients with systolic heart failure were admitted to Mohammadi hospital in Bandar Abbas in 2008.Thyroid function test w...

QT Interval: Correction for Heart Rate

There are several empirically based proposals in the literature for adjusting QT intervals for heart rate. Two widely used correction formulas are Bazett’s and Fridericia’s. This study examines the general formulation of heart rate correction of QT intervals, and several of the existing adjustments are used with this approach. Simple correction formulas for both populations and individuals have...

Interval linear regression

‎In this paper‎, ‎we have studied the analysis an interval linear regression model for fuzzy data‎. ‎In section one‎, ‎we have introduced the concepts required in this thesis and then we illustrated linear regression fuzzy sets and some primary definitions‎. ‎In section two‎, ‎we have introduced various methods of interval linear regression analysis‎. ‎In section three‎, ‎we have implemented nu...