Related Experiment Video
Updated: Jul 13, 2026
05:48
Autonomic Function Following Concussion in Youth Athletes: An Exploration of Heart Rate Variability Using 24-hour Recording Methodology
Published on: September 21, 2018
Heart rate variability index in trauma patients
Kenneth G Proctor1, Suresh A Atapattu, Robert C Duncan
1Division of Trauma, Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA. kproctor@miami.edu
The Journal of Trauma
|July 12, 2007
Summary
Heart rate variability (HRV) monitoring can be improved for trauma patients. Adjusting HRV for factors like heart rate and sedation significantly enhances its accuracy in predicting cranial CT scan results.
Area of Science:
- Cardiology
- Autonomic Nervous System Research
- Trauma Medicine
Background:
- Heart rate variability (HRV) changes indicate autonomic dysfunction but lack specificity.
- Current HRV measurement methods are complex and non-interchangeable, limiting clinical use.
- Controlling confounding factors may improve HRV's specificity in trauma patient screening.
Purpose of the Study:
- To enhance the specificity of HRV as a screening tool for trauma patients.
- To investigate the impact of confounding factors on HRV accuracy.
- To develop an improved HRV index for clinical application.
Main Methods:
- Prospective observational trial involving healthy volunteers and trauma patients.
- Measured HRV using SDNN5 and RMSSD5 from 5-minute ECG recordings.
- Utilized multiple logistic regression to adjust HRV for confounding factors like heart rate, sedation, age, gender, and blood pressure.
Main Results:
- SDNN5 and RMSSD5 values differed significantly across trauma, sedation, and CT scan categories (p < 0.001).
- Wide overlap in HRV values and strong inverse correlations with heart rate were observed.
- An adjusted HRV index improved specificity from 0.56 to 0.77 and efficiency from 0.68 to 0.80.
Conclusions:
- Multiple factors influence HRV in patients.
- Indexing HRV for confounding factors improves its specificity and efficiency in predicting pathological states.
- The developed algorithm can be refined with additional factors for enhanced diagnostic and prognostic capabilities.
Related Concept Videos
01:20Assessment of Ventilation I: Respiratory Rate
Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
01:30Factors Influencing Heart Rate
The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
01:29Dysrhythmias III: Characteristics of Dysrhythmias
Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.
01:17Increased pulse rate
Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
01:19Special considerations while measuring oxygen saturation
Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is important.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is important.
01:19Cardiac Output I:Effect of Heart Rate on Cardiac Output
Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart rate...
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart rate...