R: Cardiovascular Responses to Head-up Tilt

LASERI {ICSNP} | R Documentation

## Cardiovascular Responses to Head-up Tilt

### Description

This data set contains the cardiovascular responses to a passive head-up tilt for 223 subjects.

### Usage

    data(LASERI)

### Format

A data frame with 223 observations on the following 32 variables.

`Sex`

  a factor with levels `Female` and `Male`.

`Age`

  Age in years.

`Height`

  Height in cm.

`Weight`

  Weight in kg.

`Waist`

  Waist circumference in cm.

`Hip`

  Hip circumference in cm.

`BMI`

  Body mass index.

`WHR`

  Waist hip ratio.

`HRT1`

  Average heart rate in the tenth minute of rest.

`HRT2`

  Average heart rate in the second minute during the tilt.

`HRT3`

  Average heart rate in the fifth minute during the tilt.

`HRT4`

  Average heart rate in the fifth minute after the tilt.

`COT1`

  Average cardiac output in the tenth minute of rest.

`COT2`

  Average cardiac output in the second minute during the tilt.

`COT3`

  Average cardiac output in the fifth minute during the tilt.

`COT4`

  Average cardiac output in the fifth minute after the tilt.

`SVRIT1`

  Average systemic vascular resistance index in the tenth minute of rest.

`SVRIT2`

  Average systemic vascular resistance index in the second minute during the tilt.

`SVRIT3`

  Average systemic vascular resistance index in the fifth minute during the tilt.

`SVRIT4`

  Average systemic vascular resistance index in the fifth minute after the tilt.

`PWVT1`

  Average pulse wave velocity in the tenth minute of rest.

`PWVT2`

  Average pulse wave velocity in the second minute during the tilt.

`PWVT3`

  Average pulse wave velocity in the fifth minute during the tilt.

`PWVT4`

  Average pulse wave velocity in the fifth minute after the tilt.

`HRT1T2`

  Difference `HRT1` - `HRT2`.

`COT1T2`

  Difference `COT1` - `COT2`.

`SVRIT1T2`

  Difference `SVRIT1` - `SVRIT2`.

`PWVT1T2`

  Difference `PWVT1` - `PWVT2`.

`HRT1T4`

  Difference `HRT1` - `HRT4`.

`COT1T4`

  Difference `COT1` - `COT4`.

`SVRIT1T4`

  Difference `SVRIT1` - `SVRIT4`.

`PWVT1T4`

  Difference `PWVT1` - `PWVT4`.

### Details

This data is a subset of hemodynamic data collected as a part of the LASERI study (English title: “Cardivascular risk in young Finns study”) using whole-body impedance cardiography and plethysmographic blood pressure recordings from fingers. The data given here comes from 223 healthy subjects between 26 and 42 years of age, who participated in the recording of the hemodynamic variables both in a supine position and during a passive head-up tilt on a motorized table. During that experiment the subject spent the first ten minutes in a supine position, then the motorized table was tilted to a head-up position (60 degrees) for five minutes, and for the last five minutes the table was again returned to the supine position.

Of interest in this data is for example if the values 5 minutes after the tilt are already returned to their pre-tilt levels.

### Source

Data courtesy of the LASERI study
(http://youngfinnsstudy.utu.fi/).

### Examples

    # for example testing if the location before the tilt is the same as
    # 5 minutes after the tilt:
    data(LASERI)
    DIFFS.T1T4 <- subset(LASERI,select=c(HRT1T4,COT1T4,SVRIT1T4))
    rank.ctest(DIFFS.T1T4)
    rank.ctest(DIFFS.T1T4, score="s")

[Package ICSNP version 1.1-0 Index]