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Abbreviation: SDNN
Appearance Frequency: 708 time(s)
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Long Form No. Long Form Research Area Co-occurring Abbreviation PubMed/MEDLINE Info. (Year, Title)
standard deviation of normal-to-normal intervals
(566 times)
Cardiology
(131 times)
HRV (407 times)
HF (198 times)
LF (193 times)
1996 Transient sympathovagal imbalance triggers "ischemic" sudden death in patients undergoing electrocardiographic Holter monitoring.
SD of normal RR intervals
(50 times)
Cardiology
(19 times)
HRV (29 times)
HF (8 times)
LF (8 times)
1995 Effects of enalapril on heart rate variability in patients with congestive heart failure.
standard deviation
(32 times)
Physiology
(9 times)
HRV (22 times)
LF (10 times)
HF (8 times)
1994 [Study of the autonomic behavior of escape rhythms in congenital atrioventricular block].
SD of the NN interval
(7 times)
Cardiology
(5 times)
HRV (6 times)
HF (4 times)
LF (4 times)
1999 Screening of obstructive sleep apnea syndrome by heart rate variability analysis.
standard deviation of the interval between normal beats
(6 times)
Cardiology
(3 times)
HRV (4 times)
ANS (2 times)
AF (1 time)
2005 PM(2.5) induces acute electrocardiographic alterations in healthy rats.
significant changes in time domain
(2 times)
Medicine
(1 time)
HRV (2 times)
2014 Cardiac autonomic responses induced by a single bout of exercise with flexible pole.
successive normal-to-normal interval differences (RMSSD) ratio from 1-min recordings
(2 times)
Physiology
(1 time)
HRV (1 time)
LF (1 time)
RMSSD (1 time)
2018 Ultra-shortened time-domain HRV parameters at rest and following exercise in athletes: an alternative to frequency computation of sympathovagal balance.
s.d. of normal-to-normal heartbeat intervals
(1 time)
Metabolism
(1 time)
HF (1 time)
HRV (1 time)
pNN50 (1 time)
2018 CLOCK 3111T/C genetic variant influences the daily rhythm of autonomic nervous function: relevance to body weight control.
school-time using four indicators: normal-to-normal intervals
(1 time)
Environmental Health
(1 time)
HF (1 time)
HRV (1 time)
LF (1 time)
2019 Child's buccal cell mitochondrial DNA content modifies the association between heart rate variability and recent air pollution exposure at school.
10  SD normal-to normal
(1 time)
Obesity
(1 time)
CABG (1 time)
HRV (1 time)
T2D (1 time)
2013 Impact of visceral obesity on cardiac parasympathetic activity in type 2 diabetics after coronary artery bypass graft surgery.
11  SD of 24-hour N-N intervals
(1 time)
Cardiology
(1 time)
HRV (1 time)
MI (1 time)
2001 Effect of sertraline on the recovery rate of cardiac autonomic function in depressed patients after acute myocardial infarction.
12  SD of all normal-to-normal RR intervals in the entire recording
(1 time)
Sports Medicine
(1 time)
CAN (1 time)
HF (1 time)
HRV (1 time)
2008 Heart rate variability modifications following exercise training in type 2 diabetic patients with definite cardiac autonomic neuropathy.
13  SD of normal-to-normal intervals at baseline
(1 time)
Cardiology
(1 time)
HR (1 time)
1995 Usefulness of heart rate variability in predicting drug efficacy (metoprolol vs diltiazem) in patients with stable angina pectoris.
14  SDNN and LF were reduced compared to controls
(1 time)
Brain
(1 time)
ABI (1 time)
HRV (1 time)
LF (1 time)
2014 Heart rate variability in neurorehabilitation patients with severe acquired brain injury.
15  SDNN index
(1 time)
Pediatrics
(1 time)
CAL (1 time)
cTnI (1 time)
HF (1 time)
2015 [Relationship between heart rate variability and coronary artery lesion in children with Kawasaki disease].
16  sensitivity, heart rate variability in the time domain
(1 time)
Athletic Injuries
(1 time)
HIRREM (1 time)
2016 A Preliminary Study of the Effectiveness of an Allostatic, Closed-Loop, Acoustic Stimulation Neurotechnology in the Treatment of Athletes with Persisting Post-concussion Symptoms.
17  Sensitized mice had decreased HRV prior to challenge
(1 time)
Physiological Phenomena
(1 time)
OVA (2 times)
AW (1 time)
HF (1 time)
2012 OVA-induced airway hyperresponsiveness alters murine heart rate variability and body temperature.
18  significant difference
(1 time)
Cardiovascular Diseases
(1 time)
ASD (1 time)
HRV (1 time)
2016 Heart rate variability improvement in children using transcatheter atrial septal defect closure.
19  significantly during the observation period
(1 time)
Cardiology
(1 time)
ACE (1 time)
HRT (1 time)
HRV (1 time)
2005 Changes in heart rate, heart rate variability, and heart rate turbulence during evolving reperfused myocardial infarction.
20  significantly predicted heart rate variability
(1 time)
Psychiatry
(1 time)
--- 2015 Heart rate variability and Omega-3 Index in euthymic patients with bipolar disorders.
21  sinus RR intervals during a 24-hour period
(1 time)
Cardiology
(1 time)
HRV (1 time)
pNN50 (1 time)
2010 Relation of high heart rate variability to healthy longevity.
22  Sleep efficiency (r=-0.183) and all HRV parameters
(1 time)
Vascular Diseases
(1 time)
AHI (1 time)
HRV (1 time)
HSCAA (1 time)
2015 Sleep, cardiac autonomic function, and carotid atherosclerosis in patients with cardiovascular risks: HSCAA study.
23  slight decreases in HRV indices
(1 time)
Natural Science Disciplines
(1 time)
ECG (1 time)
HRV (1 time)
PM2.5 (1 time)
2016 Effect of welding fume on heart rate variability among workers with respirators in a shipyard.
24  space displacement neural network
(1 time)
Biomedical Engineering
(1 time)
MAN (1 time)
MLP (1 time)
STDNN (1 time)
1999 A space-time delay neural network for motion recognition and its application to lipreading.
25  SSD and controls
(1 time)
Psychiatry
(1 time)
HRV (1 time)
pNN50 (1 time)
SSD (1 time)
2018 Characteristics of Autonomic Activity and Reactivity During Rest and Emotional Processing and Their Clinical Correlations in Somatic Symptom Disorder.
26  standard deviation of all intervals measured between consecutive sinus beats
(1 time)
Medicine
(1 time)
HR (1 time)
RMSSD (1 time)
2015 Do lambs perceive regular human stroking as pleasant? Behavior and heart rate variability analyses.
27  standard deviation of all normal intervals between consecutive heart beats
(1 time)
Physical Fitness
(1 time)
FFM (1 time)
FM (1 time)
HRV (1 time)
2014 Autonomic modulation and its relation with body composition in swimmers.
28  standard deviation of all normal NN
(1 time)
Biomedical Research
(1 time)
HF (1 time)
LF (1 time)
pNN50 (1 time)
2015 The Effects of Guided Imagery on Heart Rate Variability in Simulated Spaceflight Emergency Tasks Performers.
29  standard deviation of all the adjacent intervals between normal beats
(1 time)
Cardiology
(1 time)
HRV (1 time)
MIBG (1 time)
2001 Adrenergic nervous activity in patients after surgical correction of tetralogy of Fallot.
30  standard deviation of consecutive activation cycle length
(1 time)
Cardiology
(1 time)
SGNA (1 time)
2006 Circadian variations of stellate ganglion nerve activity in ambulatory dogs.
31  standard deviation of electrocardiogram R-R interval
(1 time)
Military Medicine
(1 time)
HRV (1 time)
LF/HF (1 time)
mTBI (1 time)
2016 Linear analysis of heart rate variability in post-concussive syndrome.
32  standard deviation of heart rate
(1 time)
Environmental Health
(1 time)
EEG (1 time)
KSS (1 time)
2007 Use of subjective and physiological indicators of sleepiness to predict performance during a vigilance task.
33  Standard deviation of intervals between all normal sinus beats
(1 time)
General Surgery
(1 time)
HRV (1 time)
2009 Gastric bypass and cardiac autonomic activity: influence of gender and age.
34  standard deviation of nearest neighbour distances
(1 time)
Medicine
(1 time)
AITS (1 time)
AWTS (1 time)
NN (1 time)
2016 The Influence of Matrix Size on Statistical Properties of Co-Occurrence and Limiting Similarity Null Models.
35  Standard Deviation of NN, here heart beats
(1 time)
Cognitive Science
(1 time)
CV (1 time)
CVD (1 time)
HF (1 time)
2016 Executive Cognitive Functioning and Cardiovascular Autonomic Regulation in a Population-Based Sample of Working Adults.
36  standard deviation of normal-normal electrocardiogram RR intervals
(1 time)
BJ (1 time)
HRV (1 time)
LF (1 time)
2014 Effects of Nitrate Supplementation on Cardiovascular and Autonomic Reactivity in African-American Females.
37  standard deviation of R-wave to R-wave intervals
(1 time)
Cardiology
(1 time)
HRV (1 time)
1998 Physical activity, mental stress, and short-term heart rate variability in patients with ischemic heart disease.
38  standard deviation of RR intervals over the entire analyzed period
(1 time)
Cardiology
(1 time)
AF (1 time)
FPs (1 time)
GP (1 time)
2013 The effect of fat pad modification during ablation of atrial fibrillation: late gadolinium enhancement MRI analysis.
39  standard deviation of RR intervals, time between consecutive QRS complexes
(1 time)
Endocrinology
(1 time)
BMI (1 time)
HbA1c (1 time)
HRV (1 time)
2018 Higher body mass index predicts cardiac autonomic dysfunction: A longitudinal study in adolescent type 1 diabetes.
40  standard deviation of successive values
(1 time)
Exercise Therapy
(1 time)
ATP (1 time)
HF (1 time)
LF (1 time)
2018 Oral adenosine 5'-triphosphate supplementation improved hemodynamic and autonomic parameters after exercise in hypertensive women.
41  standard deviation of the beat duration
(1 time)
Transplantation
(1 time)
LVADs (1 time)
RMSSD (1 time)
2014 Continuous monitoring of cardiac rhythms in left ventricular assist device patients.
42  standard deviation of the mean
(1 time)
Rheumatology
(1 time)
HRV (1 time)
2000 Heart rate variability in patients with Sjogren's syndrome.
43  standard deviation of the normal-normal interval of heart beats
(1 time)
Health Services
(1 time)
ANS (1 time)
HRV (1 time)
SC (1 time)
2019 The relationship between sleep and autonomic health.
44  standard deviation of the R-R intervals over a 24-hour period
(1 time)
Cardiology
(1 time)
CHF (1 time)
HRV (1 time)
pNN50 (1 time)
2004 Effect of nesiritide (human b-type natriuretic peptide) and dobutamine on heart rate variability in decompensated heart failure.
45  standard deviation of time between heart beats
(1 time)
Biophysics
(1 time)
ApEn (1 time)
HRV (1 time)
MF (1 time)
2004 Influence of 50 Hz magnetic field on human heart rate variability: linear and nonlinear analysis.
46  standard deviation of time intervals between consecutive normal beats
(1 time)
Pulmonary Medicine
(1 time)
COPD (1 time)
HRV (1 time)
IL-6 (1 time)
2015 Cardiac Sympathetic Dominance and Systemic Inflammation in COPD.
47  standard difference
(1 time)
Aerospace Medicine
(1 time)
DBP (1 time)
G-LOC (1 time)
HC (1 time)
2002 [Assessment of autonomic nervous function during orthostatic stress in pilots with history of syncope].
48  subjects than in deceased subjects
(1 time)
Medicine
(1 time)
CVRR (1 time)
HRV (1 time)
2013 Prognostic value of heart rate variability in comparison with annual health examinations in very elderly subjects.
49  suggesting reduced autonomic regulation of heart with increase in age
(1 time)
Medical Informatics
(1 time)
HF-n.u (1 time)
HRV (1 time)
2013 Influence of age and gender on autonomic regulation of heart.
50  system activity and long term FHRV
(1 time)
Biomedical Engineering
(1 time)
FHRV (2 times)
FECG (1 time)
FHR (1 time)
2016 Assessment of autonomic neurodevelopment in the mouse fetuses by using fetal electrocardiography.