The effect of ice water ingestion on autonomic modulation in healthy subjects.
Summary of "The effect of ice water ingestion on autonomic modulation in healthy subjects."
Drinking ice water is a common daily activity. The safety of ice water ingestion has been questioned due to its possible deleterious effect on heart rate or cardiac rhythm, especially in patients with acute myocardial infarction. Thus, we investigated the heart rate variability (HRV) before and after ice water ingestion in normal subjects to delineate the possible effect of ice water ingestion on autonomic nervous modulation.
Subjects were volunteers who came to the hospital to receive routine health examination. They were randomly assigned to drinking 250 ml of ice water or room temperature water. Twenty-eight subjects in the room temperature water ingestion group and 25 subjects in the ice water ingestion group were studied. The relationships between the change in HRV measures before and after water ingestion and clinical parameters were assessed by correlation analysis.
After ice water ingestion, the percentage change in mean RR intervals (RRIs) (4 +/- 4 vs. -1 +/- 4, P < 0.001), standard deviation of RRIs (19 +/- 35 vs. 0 +/- 21, P = 0.018), high-frequency power (64 +/- 90 vs. -3 +/- 41, P < 0.001), and normalized high-frequency power (39 +/- 99 vs. -5 +/- 31, P = 0.038) were higher, while the percentage change in low-/high-frequency power ratio (3 +/- 92 vs. 44 +/- 97, P = 0.017) was lower, when compared with those after the room temperature water ingestion.
Ice water ingestion can decrease heart rate through temperature stimulus-mediated vagal enhancement in healthy subjects.
Institute of Traditional Medicine, National Yang-Ming University School of Medicine, Taipei, Taiwan.
This article was published in the following journal.
Name: Clinical autonomic research : official journal of the Clinical Autonomic Research Society
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20680385
- DOI: http://dx.doi.org/10.1007/s10286-010-0077-3
This study compared autonomic modulation in swimmers and non-athletes in relation to body composition. A total of 28 athletes with a mean age of [19.7 ± 2.9 years] were evaluated who had at least two...
Aim. To summarize all relevant trials and critically evaluate the effect of acupuncture on heart rate variability (HRV). Method. This was a systematic review with meta-analysis. Keyword search was con...
Recent evidence indicates that cerebral palsy is connected to specific autonomic dysregulation between sympathetic and parasympathetic efferent pathways, likely linked to hemispheric influences. These...
Motor impairment in Parkinson's disease (PD) is partly due to defective central processing of lower limbs afferents. Concomitant alterations in cardiovascular autonomic control leading to orthostatic...
In this study the investigators propose to assess the hemodynamic response to the ingestion of 16 fl oz of water. The investigators will test the hypothesis that water ingestion will incr...
Since Tai Chi Chuan (TCC) training has been shown to be beneficial to the cardiopulmonary function of the subject, TCC might have a beneficial effect on the pulmonary function, autonomic n...
The principal objective of this research is the evaluation of the effect of mineralized water consumption upon evolution of LDL Cholesterol and triglycerides, compared to a low mineralized...
The purpose of the study is to determine if pyridostigmine bromide improves heart rate variability of type 2 diabetes mellitus subjects with cardiovascular autonomic neuropathy.
To assess the effects of GTN on QT and QTc in subjects with And without atrial pacing. This will be done with and without autonomic blockade at two different pacing rates. Moxifloxacin eff...
Medical and Biotech [MESH] Definitions
Agents affecting the function of, or mimicking the actions of, the autonomic nervous system and thereby having an effect on such processes as respiration, circulation, digestion, body temperature regulation, certain endocrine gland secretions, etc.
Adverse effect upon bodies of water (lakes, RIVERS, seas, groundwater etc.) caused by CHEMICAL WATER POLLUTANTS.
A condition where damage to the peripheral nervous system (including the peripheral elements of the autonomic nervous system) is associated with chronic ingestion of alcoholic beverages. The disorder may be caused by a direct effect of alcohol, an associated nutritional deficiency, or a combination of factors. Clinical manifestations include variable degrees of weakness; ATROPHY; PARESTHESIAS; pain; loss of reflexes; sensory loss; diaphoresis; and postural hypotension. (From Arch Neurol 1995;52(1):45-51; Adams et al., Principles of Neurology, 6th ed, p1146)
Loss of detectable antigen from the surface of a cell after incubation with antibodies. This is one method in which some tumors escape detection by the immune system. Antigenic modulation of target antigens also reduces the therapeutic effectiveness of treatment by monoclonal antibodies.
The effect of GLOBAL WARMING and the resulting increase in world temperatures. The predicted health effects of such long-term climatic change include increased incidence of respiratory, water-borne, and vector-borne diseases.