Stimulants for ADHD Affect Heart Rate, EKG

1. In both the turtle, Pseudemys scripta, and the tortoise, Testudo graeca, lung ventilation is closely accompanied by a tachycardia of predictable magnitude and duration. 2. Efferent vagal activity progressively decreases as heart rate increases with the onset of lung ventilation. Atropine decreases heart rate during apnoea to those levels observed during prolonged breathing series when the development, duration or magnitude of ventilation tachycardia. It is thus concluded that heart rate change during chelonian lung ventilation is mediated solely by alterations in vagal tone. 3. Peripheral sensory reflexes involving pulmonary stretch receptors, arterial chemoreceptors and baroreceptors, and receptors stimulated by water immersion do not affect heart rate during breathing. It is suggested that ventilation tachycardia in these chelonians is the result of the spread of activity between the respiratory and cardiac centres of the medulla.

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Reduced parasympathetic control of heart rate in obese dogs

AJP Heart and Circulatory Physiology ◽

10.1152/ajpheart.1995.269.2.h629 ◽

1995 ◽

Vol 269 (2) ◽

pp. H629-H637 ◽

Cited By ~ 21

Author(s):

B. N. Van Vliet ◽

J. E. Hall ◽

H. L. Mizelle ◽

J. P. Montani ◽

M. J. Smith

Keyword(s):

Blood Pressure ◽

Heart Rate ◽

Rate Control ◽

Saturated Fat ◽

Pressure Control ◽

Resting Heart Rate ◽

Arterial Blood ◽

Parasympathetic Control ◽

The Mean ◽

Affect Heart Rate

We investigated why resting heart rate is elevated in dogs fed a high saturated fat diet for 12.7 +/- 1.8 wk. Obese dogs exhibited elevated body weight (59%), blood pressure (14%), and heart rate (25%). Differences in resting heart rate (control, 58 +/- 5 beats/min; obese, 83 +/- 7 beats/min) were abolished after hexamethonium, indicating an autonomic mechanism. Hexamethonium also reduced blood pressure in obese (20 +/- 4 mmHg) but not control (9 +/- 6 mmHg) animals. Propranolol did not affect heart rate in either group, excluding a beta-adrenergic mechanism. Subsequent administration of atropine increased heart rate more in control than in obese dogs (110 +/- 9 vs. 57 +/- 11 beats/min). The sensitivity of the cardiac limb of the baroreflex (Oxford method) was reduced by 46% in the obese group, confirming impairment of the parasympathetic control of heart rate. The standard deviation of blood pressure measurements was normal when expressed as a percentage of the mean arterial blood pressure (control, 11.2 +/- 0.4%; obese, 11.2 +/- 0.5%). Our results indicate that the development of obesity in dogs fed a high saturated fat diet is accompanied by an attenuated resting and reflex parasympathetic control of heart rate.

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Variations in cognitive demand affect heart rate in typically developing children and children at risk for developmental coordination disorder

Research in Developmental Disabilities ◽

10.1016/j.ridd.2014.12.002 ◽

2015 ◽

Vol 38 ◽

pp. 362-371 ◽

Cited By ~ 5

Author(s):

F.C. Chen ◽

C.L. Tsai ◽

G.R. Biltz ◽

T.A. Stoffregen ◽

M.G. Wade

Keyword(s):

At Risk ◽

Heart Rate ◽

Developmental Coordination Disorder ◽

Cognitive Demand ◽

Typically Developing ◽

Children At Risk ◽

Typically Developing Children ◽

Coordination Disorder ◽

Affect Heart Rate

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Musical Rhythms Affect Heart Rate Variability: Algorithm and Models

Advances in Electrical Engineering ◽

10.1155/2014/851796 ◽

2014 ◽

Vol 2014 ◽

pp. 1-14 ◽

Cited By ~ 3

Author(s):

Hui-Min Wang ◽

Sheng-Chieh Huang

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

High Frequency ◽

Physiological Model ◽

Psychological Model ◽

Two Measures ◽

Electrocardiogram Ecg ◽

Musical Rhythms ◽

Increased Valence ◽

Affect Heart Rate

There were a lot of psychological music experiments and models but there were few psychological rhythm experiments and models. There were a lot of physiological music experiments but there were few physiological music models. There were few physiological rhythm experiments but there was no physiological rhythm model. We proposed a physiological rhythm model to fill this gap. Twenty-two participants, 4 drum loops as stimuli, and electrocardiogram (ECG) were employed in this work. We designed an algorithm to map tempo, complexity, and energy into two heart rate variability (HRV) measures, the standard deviation of normal-to-normal heartbeats (SDNN) and the ratio of low- and high-frequency powers (LF/HF); these two measures form the physiological valence/arousal plane. There were four major findings. Initially, simple and loud rhythms enhanced arousal. Secondly, the removal of fast and loud rhythms decreased arousal. Thirdly, fast rhythms increased valence. Finally, the removal of fast and quiet rhythms increased valence. Our work extended the psychological model to the physiological model and deepened the musical model into the rhythmic model. Moreover, this model could be the rules of automatic music generating systems.

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Single Vs. Multiple Bouts of Exercise Similarly Affect Heart Rate Variability

Medicine & Science in Sports & Exercise ◽

10.1249/00005768-200505001-00064 ◽

2005 ◽

Vol 37 (Supplement) ◽

pp. S5

Author(s):

Jill Kanaley ◽

Tracy Baynard ◽

Ruth Franklin ◽

Robert Carhart ◽

Arturo Figueroa ◽

...

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Affect Heart Rate

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Distal Traditional Acupuncture Points of the Large Intestinal Meridian and the Stomach Meridian Differently Affect Heart Rate Variability and Oxygenation of the Trapezius Muscle

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2014/283010 ◽

2014 ◽

Vol 2014 ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

Yukiko Shiro ◽

Young-Chang P. Arai ◽

Tatsunori Ikemoto ◽

Takashi Kawai ◽

Masahiko Ikeuchi ◽

...

Keyword(s):

Heart Rate ◽

Heart Rate Variability ◽

Acupuncture Point ◽

Trapezius Muscle ◽

The Body ◽

Control Group ◽

Acupuncture Points ◽

Stomach Meridian ◽

Frequency Components ◽

Affect Heart Rate

Physicians in traditional Chinese medicine have found that acupoints and meridians have effects on specific parts of the body. The aim of this study was to see how acupressure at distal acupuncture points of a specific meridian affects heart rate variability (HRV) and oxygenation of the trapezius muscle. Forty-one female participants were randomly allocated to three groups. Subjects in the Stomach Meridian acupuncture point (ST) group received acupressure at ST 34, ST 36, and ST 41, subjects in the Large Intestinal Meridian acupuncture point (LI) group received acupressure at LI 4, LI 10, and LI 11, and subjects in the control group did not receive any stimuli. HRV and oxygenation of the trapezius muscles were measured. The high frequency components of HRV in the control and LI groups tended to be higher than those in the ST group. Total hemoglobin in the control and LI groups eventually reached significantly higher levels than in the ST group. While oxyhemoglobin (ΔO2Hb) in the control and LI groups did not change, ΔO2Hb in the ST significantly decreased temporarily.

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