scholarly journals Comparison of cardiovascular responses following self-selected maximal effort in forward, backward and sideways walking

2017 ◽  
Vol 3 (2) ◽  
pp. 67
Author(s):  
Adetoyeje Y. Oyeyemi ◽  
Aliyu Lawan ◽  
Godson J. Akpeli ◽  
Adewale L. Oyeyemi
Keyword(s):  
Cardiovascular Responses ◽  
Maximal Effort

scholarly journals Acute volume loading and exercise capacity in postural tachycardia syndrome

2014 ◽  
Vol 117 (6) ◽  
pp. 663-668 ◽  
Author(s):  
Rocío A. Figueroa ◽  
Amy C. Arnold ◽  
Victor C. Nwazue ◽  
Luis E. Okamoto ◽  
Sachin Y. Paranjape ◽  
...  
Keyword(s):  
Stroke Volume ◽  
Exercise Capacity ◽  
Cardiovascular Responses ◽  
Exercise Intolerance ◽  
Peak Exercise ◽  
Postural Tachycardia Syndrome ◽  
Volume Loading ◽  
Cardiac Atrophy ◽  
Postural Tachycardia ◽  
Maximal Effort

Postural tachycardia syndrome (POTS) is associated with exercise intolerance, hypovolemia, and cardiac atrophy, which may contribute to reduced stroke volume and compensatory exaggerated heart rate (HR) increases. Acute volume loading with intravenous (iv) saline reduces HR and improves orthostatic tolerance and symptoms in POTS, but its effect on exercise capacity is unknown. In this study, we determined the effect of iv saline infusion on peak exercise capacity (V̇o2peak) in POTS. Nineteen patients with POTS participated in a sequential study. V̇o2peak was measured on two separate study days, following administration of placebo or 1 liter of iv saline (NaCl 0.9%). Patients exercised on a semirecumbent bicycle with resistance increased by 25 W every 2 min until maximal effort was achieved. Patients exhibited blood volume deficits (−13.4 ± 1.4% ideal volume), consistent with mild to moderate hypovolemia. At baseline, saline significantly increased stroke volume (saline 80 ± 8 ml vs. placebo 64 ± 4 ml; P = 0.010), increased cardiac output (saline 6.9 ± 0.5 liter/min vs. placebo 5.7 ± 0.2 liter/min; P = 0.021), and reduced systemic vascular resistance (saline 992.6 ± 70.0 dyn-s/cm5 vs. placebo 1,184.0 ± 50.8 dyn-s/cm5; P = 0.011), with no effect on HR or blood pressure. During exercise, saline did not produce differences in V̇o2peak (saline 26.3 ± 1.2 mg·kg−1·min−1 vs. placebo 27.7 ± 1.8 mg·kg−1·min−1; P = 0.615), peak HR [saline 174 ± 4 beats per minute (bpm) vs. placebo 175 ± 3 bpm; P = 0.672] or other cardiovascular parameters. These findings suggest that acute volume loading with saline does not improve V̇o2peak or cardiovascular responses to exercise in POTS, despite improvements in resting hemodynamic function.

John Ludbrook APPS Symposium Neural Mechanisms In The Cardiovascular Responses To Acute Central Hypovolaemia

2001 ◽  
Vol 28 (5-6) ◽  
pp. 479-487
Author(s):  
Roger G Evans ◽  
Sabatino Ventura ◽  
Roger Al Dampney ◽  
John Ludbrook
Keyword(s):  
Cardiovascular Responses ◽  
Neural Mechanisms ◽  
Central Hypovolaemia

In Search of Somatic Precursors of Spontaneous Insight

2018 ◽  
Vol 32 (3) ◽  
pp. 97-105 ◽  
Author(s):  
Wangbing Shen ◽  
Yuan Yuan ◽  
Chaoying Tang ◽  
Chunhua Shi ◽  
Chang Liu ◽  
...  
Keyword(s):  
Problem Solving ◽  
Direct Evidence ◽  
Electrodermal Activity ◽  
Cardiovascular Responses ◽  
Solution Time ◽  
Problem Solution ◽  
Insight Problem ◽  
Creative Insight ◽  
Insight Problem Solving ◽  
Analytic Problem

Abstract. A considerable number of behavioral and neuroscientific studies on insight problem solving have revealed behavioral and neural correlates of the dynamic insight process; however, somatic correlates, particularly somatic precursors of creative insight, remain undetermined. To characterize the somatic precursor of spontaneous insight, 22 healthy volunteers were recruited to solve the compound remote associate (CRA) task in which a problem can be solved by either an insight or an analytic strategy. The participants’ peripheral nervous activities, particularly electrodermal and cardiovascular responses, were continuously monitored and separately measured. The results revealed a greater skin conductance magnitude for insight trials than for non-insight trials in the 4-s time span prior to problem solutions and two marginally significant correlations between pre-solution heart rate variability (HRV) and the solution time of insight trials. Our findings provide the first direct evidence that spontaneous insight in problem solving is a somatically peculiar process that is distinct from the stepwise process of analytic problem solving and can be represented by a special somatic precursor, which is a stronger pre-solution electrodermal activity and a correlation between problem solution time and certain HRV indicators such as the root mean square successive difference (RMSSD).

The role of compassionate love in shaping psychological, behavioral, and cardiovascular responses to a partner in distress

2014 ◽  
Author(s):  
Molly Ann Metz ◽  
Heidi Kane ◽  
Thery Prok ◽  
Christena Cleveland ◽  
Nancy Collins
Keyword(s):  
Cardiovascular Responses ◽  
Compassionate Love

Anger and threat cardiovascular responses to interactions with a prejudiced other

2007 ◽  
Author(s):  
Sarah S. M. Townsend ◽  
Pamela J. Sawyer ◽  
Bettina J. Casad ◽  
Brenda Major ◽  
Wendy Berry Mendes
Keyword(s):  
Cardiovascular Responses

An experience of performing spirometry by trained general practitioners

2020 ◽  
pp. 34-36
Author(s):  
M. A. Pokhaznikova ◽  
E. A. Andreeva ◽  
O. Yu. Kuznetsova
Keyword(s):  
General Practitioners ◽  
Quality Criteria ◽  
Poor Quality ◽  
Male Gender ◽  
Study Research ◽  
The Poor ◽  
Quality Of Research ◽  
Forced Expiratory Maneuver ◽  
Maximal Effort

The article discusses the experience of teaching and conducting spirometry of general practitioners as part of the RESPECT study (RESearch on the PrEvalence and the diagnosis of COPD and its Tobacco-related aetiology). A total of 33 trained in spirometry general practitioners performed a study of 3119 patients. Quality criteria met 84.1% of spirometric studies. The analysis of the most common mistakes made by doctors during the forced expiratory maneuver is included. The most frequent errors were expiration exhalation of less than 6s (54%), non-maximal effort throughout the test and lack of reproducibility (11.3%). Independent predictors of poor spirogram quality were male gender, obstruction (FEV1 /FVC<0.7), and the center where the study was performed. The number of good-quality spirograms ranged from 96.1% (95% CI 83.2–110.4) to 59.8% (95% CI 49.6–71.4) depending on the center. Subsequently, an analysis of the reasons behind the poor quality of research in individual centers was conducted and the identified shortcomings were eliminated. The poor quality of the spirograms was associated either with the errors of the doctors who undertook the study or with the technical malfunctions of the spirometer.

Fast Foes: The affective consequences of interacting in a negative self-disclosure situation.

2020 ◽  
Author(s):  
Jonathan Gordils ◽  
Jeremy Jamieson
Keyword(s):  
Social Interactions ◽  
Social Life ◽  
Large Body ◽  
Cardiovascular Responses ◽  
Social Contexts ◽  
Subjective Experiences ◽  
Self Disclosure ◽  
Negative Behaviors ◽  
Nuanced Understanding ◽  
Affective Consequences

Background and Objectives: Social interactions involving personal disclosures are ubiquitous in social life and have important relational implications. A large body of research has documented positive outcomes from fruitful social interactions with amicable individuals, but less is known about how self-disclosing interactions with inimical interaction partners impacts individuals. Design and Methods: Participants engaged in an immersive social interaction task with a confederate (thought to be another participant) trained to behave amicably (Fast Friends) or inimically (Fast Foes). Cardiovascular responses were measured during the interaction and behavioral displays coded. Participants also reported on their subjective experiences of the interaction. Results: Participants assigned to interact in the Fast Foes condition reported more negative affect and threat appraisals, displayed more negative behaviors (i.e., agitation and anxiety), and exhibited physiological threat responses (and lower cardiac output in particular) compared to participants assigned to the Fast Friends condition. Conclusions: The novel paradigm demonstrates differential stress and affective outcomes between positive and negative self-disclosure situations across multiple channels, providing a more nuanced understanding of the processes associated with disclosing information about the self in social contexts.

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