Blood viscosity, red cell rigidity, and arterial blood pressure in patients with severe coronary occlusions or chest pains. Effect of submaximal exercise test.

2016 ◽  
Vol 1 (2) ◽  
pp. 121-134 ◽  
Author(s):  
L. Dintenfass
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Exercise Test ◽  
Blood Viscosity ◽  
Submaximal Exercise ◽  
Red Cell ◽  
Arterial Blood ◽  
Submaximal Exercise Test ◽  
Chest Pains

A study of some potential correlates of the hypotensive effects of prolonged submaximal exercise in normotensive men

1992 ◽  
Vol 70 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Jean-François Landry ◽  
Jean-Pierre Després ◽  
Denis Prud'homme ◽  
Benoît Lamarche ◽  
Angelo Tremblay ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Exercise Test ◽  
Plasma Insulin ◽  
Blood Pressure Response ◽  
Hypotensive Effect ◽  
Submaximal Exercise ◽  
Pressure Response ◽  
Epinephrine Infusion ◽  
Submaximal Exercise Test ◽  
Blood Pressure Responses

This study was undertaken (1) to examine the relation of plasma catecholamine and insulin levels to the blood pressure response during and after submaximal exercise, (2) to verify whether the blood pressure response to an epinephrine infusion is associated with the blood pressure response to a prolonged submaximal exercise, and (3) to study some potential correlates of the hypotensive effect of prolonged aerobic exercise. Nine normotensive young men (mean age 22.0 ± 1.4 years) were subjected to a 1-h epinephrine infusion protocol and a 1-h submaximal exercise test on a cycle ergometer. The two tests were performed 1 week apart. The physiological and hormonal responses observed during the submaximal exercise test were generally greater than those observed during the epinephrine infusion test. Blood pressure responses in both tests showed no significant association with changes in plasma insulin levels. Changes in plasma norepinephrine concentration were positively correlated with changes in systolic blood pressure during the submaximal exercise test but not during the epinephrine infusion. Results also showed that the blood pressure response to epinephrine infusion was not correlated with the blood pressure response to submaximal exercise. However, post-exercise and post-infusion systolic blood pressure responses (differences between "post-test" and "resting" values) were significantly associated (r = 0.81, p < 0.01). In addition, a significant hypotensive effect of submaximal exercise was observed for both systolic and diastolic blood pressure. However, the individual differences observed in the hypotensive effect of aerobic exercise appeared to be more related to variations in vascular sensitivity than to exercise-induced variations in plasma insulin and catecholamine levels, at least in this sample of healthy normotensive young men.Key words: blood pressure, exercise, catecholamines, insulin, epinephrine infusion.

Blood pressure response to exercise in young athletes aged 10 to 18 years

2016 ◽  
Vol 41 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Katarzyna Szmigielska ◽  
Anna Szmigielska-Kapłon ◽  
Anna Jegier
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Exercise Test ◽  
Blood Pressure Response ◽  
Pressure Response ◽  
Multivariate Linear Regression Analysis ◽  
Young Athletes ◽  
Arterial Blood ◽  
Systolic Arterial Blood Pressure ◽  
Response To Exercise

The aim of the study was to determine arterial blood pressure response to exercise in young athletes. The study group comprised 711 young athletes (457 boys, 254 girls) aged 10 to 18 years (mean 13.41 ± 3.12 years) who had been training for an average of 7.62 ± 4.2 h per week for an average of 4.01 ± 2.5 years. Participants with elevated arterial blood pressure above the 90th percentile at rest were excluded from investigation. A symptom-limited, multistage exercise test to exhaustion was performed using a Monark cycle ergometer. Arterial blood pressure was measured with an aneroid manometer in the third minute of each stage of the test. Mean systolic arterial blood pressure during peak exercise was significantly higher in boys than in girls: 183.21 ± 27.97 mm Hg and 170.97 ± 21.4 mm Hg, respectively (p = 0.03). Multivariate linear regression analysis showed that age and workload had significant effects on arterial blood pressure during the test. Systolic arterial blood pressure during the exercise can be described with the following equations: boys, SBPex (mm Hg) = –1.92 × age (years) + 0.55 × workload (W) + 120.84; girls, SBPex (mm Hg) = –0.88 × age (years) + 0.48 × workload (W) + 111.22. The study results describe reference values of arterial blood pressure during the exercise test. The presented equations and figures can help to assess whether the arterial blood pressure at each stage of the exercise test exceeds the normal range or not.

scholarly journals The variability of blood pressure due to small changes of hematocrit

2010 ◽  
Vol 299 (3) ◽  
pp. H863-H867 ◽  
Author(s):  
Beatriz Y. Salazar Vázquez ◽  
Judith Martini ◽  
Amy G. Tsai ◽  
Paul C. Johnson ◽  
Pedro Cabrales ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Vascular Resistance ◽  
Mean Arterial Blood Pressure ◽  
Blood Viscosity ◽  
Initial Period ◽  
Acute Effect ◽  
Isovolemic Hemodilution ◽  
Arterial Blood ◽  
Acute Increase

The hematocrit (Hct) of awake hamsters was lowered to 90% of baseline by isovolemic hemodilution using hamster plasma to determine the acute effect of small changes in Hct and blood viscosity on systemic hemodynamics. Mean arterial blood pressure increased, reaching a maximum of about 10% above baseline (8.6 ± 5.5 mmHg) when Hct decreased 8.4 ± 1.9% ( P < 0.005). Cardiac output increased continuously with hemodilution. These conditions were reached at ∼60 min after exchange transfusion and remained stationary for 1 h. Peripheral vascular resistance was approximately constant up to a decrease of Hct of about 10% and then fell continuously with lowering Hct. Vascular hindrance or vascular resistance independent of blood viscosity increased by about 20% and remained at this level up to an Hct decrease of 20%, indicating that the vasculature constricted with the lowered Hct. The results for the initial 2-h period are opposite but continuous with previous findings with small increases in Hct. In conclusion, limited acute anemic conditions increase mean arterial blood pressure during the initial period of 2 h, an effect that is quantitatively similar but opposite to the acute increase of Hct during the same period.

Effects of Intravascular Transfusion for Red Cell Alloimmunization on Fetal Arterial Blood Pressure

1997 ◽  
Vol 12 (3) ◽  
pp. 149-152 ◽  
Author(s):  
Linda A. Goodrum ◽  
Kenneth J. Moise, Jr. ◽  
George R. Saade ◽  
Michael A. Belfort ◽  
Nancy A. Ayres ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Red Cell ◽  
Arterial Blood

Nitrite infusion increases cerebral blood flow and decreases mean arterial blood pressure in rats: A role for red cell NO

Nitric Oxide ◽  
2007 ◽  
Vol 16 (4) ◽  
pp. 448-456 ◽  
Author(s):  
Joseph M. Rifkind ◽  
Enika Nagababu ◽  
Efrat Barbiro-Michaely ◽  
Somasundaram Ramasamy ◽  
Ryszard M. Pluta ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Arterial Blood Pressure ◽  
Mean Arterial Blood Pressure ◽  
Red Cell ◽  
Arterial Blood

Relationship between arterial blood pressure and blood viscosity in spontaneously hypertensive rats treated with pentoxifylline

Biorheology ◽  
2016 ◽  
Vol 53 (2) ◽  
pp. 93-107 ◽  
Author(s):  
Mark B. Plotnikov ◽  
Oleg I. Aliev ◽  
Alexey V. Nosarev ◽  
Alexander Y. Shamanaev ◽  
Anastasia V. Sidekhmenova ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Blood Viscosity ◽  
Spontaneously Hypertensive Rats ◽  
Hypertensive Rats ◽  
Spontaneously Hypertensive ◽  
Arterial Blood

Resting Systolic Blood Pressure and Heart Rate at Work

1980 ◽  
Vol 8 (3) ◽  
pp. 117-123 ◽  
Author(s):  
Björn G. Jonsson ◽  
Irma Åstrand
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Systolic Blood Pressure ◽  
Exercise Test ◽  
Submaximal Exercise ◽  
Curvilinear Relationship ◽  
Lower Heart Rate ◽  
Men And Women ◽  
Submaximal Exercise Test ◽  
The Relationship

A random sample ( n = 1 050) of the population of a region in central Sweden performed a submaximal exercise test on bicycle ergometers. The participants were men and women aged 18 to 65 taking part in the REBUS study 1969–71 (3). This paper deals with the partial relationship between heart rate at different rates of work and systolic blood pressure measured at rest (SBP) controlling the influence of other predictors of heart rate. It was found that the relationship was non-linear and that individuals with a relatively high SBP had a lower heart rate than individuals with lower SBP. The curvilinear relationship was more pronounced in women and grew stronger with increasing rate of work.

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