Introduction: Heart rate variability is a measure of cardiac autonomic regulation and a good predictor for sudden cardiac death. Moreover, rMSSD is an indica-tor of cardiac parasympathetic activity; it is obtained by calculating the square root of the sum of successive time difference between heartbeats (measured in milli-seconds).

Objective: The aim of this paper is to investigate heart rate variability of hypertensive patients and its con-nection to subclinical cardiac expression as assessed through echocardiography.

Methods: We performed a retrospective study on hypertensive patients admitted to our clinic during a two year period. Patient demographics, medical histo-ries and treatment regimens were collected for all, along with blood test and echocardiography results, along with 24-Hour ECG Holter monitoring recordings. We excluded all patients who lacked any of the data men-tioned above, as well as those with poor quality Holter recordings. Descriptive and inferential statistics were obtained via SPSS, version 20.

Introduction: Heart rate variability is a measure of cardiac autonomic regulation and a good predictor for sudden cardiac death. Moreover, rMSSD is an indica-tor of cardiac parasympathetic activity; it is obtained by calculating the square root of the sum of successive time difference between heartbeats (measured in milli-seconds).

Objective: The aim of this paper is to investigate heart rate variability of hypertensive patients and its con-nection to subclinical cardiac expression as assessed through echocardiography.

Methods: We performed a retrospective study on hypertensive patients admitted to our clinic during a two year period. Patient demographics, medical histo-ries and treatment regimens were collected for all, along with blood test and echocardiography results, along with 24-Hour ECG Holter monitoring recordings. We excluded all patients who lacked any of the data men-tioned above, as well as those with poor quality Holter recordings. Descriptive and inferential statistics were obtained via SPSS, version 20.