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Table 2 Parameters of the dynamic characteristics of the carotid sinus baroreflex

From: Open-loop dynamic and static characteristics of the carotid sinus baroreflex in rats with chronic heart failure after myocardial infarction

 

Control (n = 12)

CHF (n = 7)

P value

Neural arc

 G 0.01 (% mmHg−1)

0.80 ± 0.10

0.50 ± 0.08

0.051

 G 0.1 (% mmHg−1)

0.99 ± 0.11

0.85 ± 0.14

0.432

 G 1 (% mmHg−1)

3.49 ± 0.34

2.64 ± 0.30

0.093

 S 50 (%)

0.75 ± 0.09

0.39 ± 0.06*

0.012

 S 10 (%)

0.78 ± 0.09

0.42 ± 0.06*

0.010

 S peak (%)

2.88 ± 0.25

2.13 ± 0.30

0.076

 T peak (s)

0.29 ± 0.01

0.31 ± 0.01

0.327

 S peak/S 50

5.30 ± 1.60

6.06 ± 1.06

0.743

Peripheral arc

 G 0.01 (mmHg %−1)

0.81 ± 0.09

0.24 ± 0.05**

<0.001

 G 0.1 (mmHg %−1)

0.29 ± 0.04

0.16 ± 0.02*

0.023

 G 1 (mmHg %−1)

0.0032 ± 0.0005

0.0050 ± 0.0015

0.211

 S 50 (mmHg)

0.84 ± 0.08

0.28 ± 0.03**

<0.001

 Initial slope (mmHg s−1)

0.134 ± 0.014

0.071 ± 0.009**

0.007

Total baroreflex

 G 0.01 (mmHg mmHg−1)

0.70 ± 0.06

0.17 ± 0.03**

<0.001

 G 0.1 (mmHg mmHg−1)

0.28 ± 0.03

0.13 ± 0.02**

0.001

 G 1 (mmHg mmHg−1)

0.013 ± 0.002

0.010 ± 0.002

0.324

 S 50 (mmHg)

0.69 ± 0.07

0.18 ± 0.05**

<0.001

 Initial slope (mmHg s−1)

0.166 ± 0.014

0.086 ± 0.009**

<0.001

Heart rate control

 G 0.01 (beats min−1 mmHg−1)

0.43 ± 0.06

0.16 ± 0.03**

0.005

 G 0.1 (beats min−1 mmHg−1)

0.11 ± 0.02

0.04 ± 0.01*

0.026

 S 50 (beats min−1)

0.46 ± 0.08

0.18 ± 0.03*

0.021

 Initial slope (beats min−1 s−1)

0.059 ± 0.009

0.020 ± 0.004**

0.006

  1. Data are presented as mean ± SE
  2. ** P < 0.01 and *P < 0.05 by unpaired t test
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The Journal of Physiological Sciences

ISSN: 1880-6562

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