Study: NCT00998465

Intervention type: OTHER
Intervention: 24-hour blood pressure
Description: Blood pressure is measured every 15 minutes in the daytime and every 30 minutes at night

Intervention type: OTHER
Intervention: 24-hour blood pressure
Description: Blood pressure is measured every 15 minutes in the daytime and every 30 minutes at night

Intervention type: OTHER
Intervention: 24-hour blood pressure
Description: Blood pressure is measured every 15 minutes in the daytime and every 30 minutes at night

Intervention type: OTHER
Intervention: Echocardiography
Description: Standard 2-D and m-mode echocardiography with determination of dimensions, systolic, and diastolic function.

Intervention type: OTHER
Intervention: Echocardiography
Description: Standard 2-D and m-mode echocardiography with determination of dimensions, systolic, and diastolic function.

Intervention type: OTHER
Intervention: Echocardiography
Description: Standard 2-D and m-mode echocardiography with determination of dimensions, systolic, and diastolic function.

Intervention type: OTHER
Intervention: Inert gas rebreathing
Description: Cardiac output, stroke volume and total peripheral resistance are tested at rest and during exercise (bicycle ergometer) using non-invasive equipment (inert gas rebreathing - Innocor)

Intervention type: OTHER
Intervention: Inert gas rebreathing
Description: Cardiac output, stroke volume and total peripheral resistance are tested at rest and during exercise (bicycle ergometer) using non-invasive equipment (inert gas rebreathing - Innocor)

Intervention type: OTHER
Intervention: Inert gas rebreathing
Description: Cardiac output, stroke volume and total peripheral resistance are tested at rest and during exercise (bicycle ergometer) using non-invasive equipment (inert gas rebreathing - Innocor)

Intervention type: RADIATION
Intervention: Dexa-scan
Description: Fat mass and fat free mass is determined with a whole body Dexa scan, and bone mineral density is tested with Dexa-scans of the lumbar spine and proximal femur.

Intervention type: RADIATION
Intervention: Dexa-scan
Description: Fat mass and fat free mass is determined with a whole body Dexa scan, and bone mineral density is tested with Dexa-scans of the lumbar spine and proximal femur.

Intervention type: RADIATION
Intervention: Dexa-scan
Description: Fat mass and fat free mass is determined with a whole body Dexa scan, and bone mineral density is tested with Dexa-scans of the lumbar spine and proximal femur.

Intervention type: RADIATION
Intervention: Plasma volume
Description: The test is performed using 5 MBq technetium-labeled albumine (99mTc-albumine - Vasculosis) with several postinjection samples for accurate zero-time extrapolation.

Intervention type: RADIATION
Intervention: Plasma volume
Description: The test is performed using 5 MBq technetium-labeled albumine (99mTc-albumine - Vasculosis) with several postinjection samples for accurate zero-time extrapolation.

Intervention type: RADIATION
Intervention: Plasma volume
Description: The test is performed using 5 MBq technetium-labeled albumine (99mTc-albumine - Vasculosis) with several postinjection samples for accurate zero-time extrapolation.

Intervention type: RADIATION
Intervention: Glomerular filtration rate (GFR)
Description: GFR and ECV are determined following injection of 3,7 MBq 51Cr-EDTA and postinjection samples three-four hours after injection.

Intervention type: RADIATION
Intervention: Glomerular filtration rate (GFR)
Description: GFR and ECV are determined following injection of 3,7 MBq 51Cr-EDTA and postinjection samples three-four hours after injection.

Intervention type: RADIATION
Intervention: Glomerular filtration rate (GFR)
Description: GFR and ECV are determined following injection of 3,7 MBq 51Cr-EDTA and postinjection samples three-four hours after injection.

Intervention type: OTHER
Intervention: Blood samples
Description: p-glucose, p-insulin, NT-proBNP, hemoglobin, potassium, sodium, creatinine, albumine

Intervention type: OTHER
Intervention: Blood samples
Description: p-glucose, p-insulin, NT-proBNP, hemoglobin, potassium, sodium, creatinine, albumine

Intervention type: OTHER
Intervention: Blood samples
Description: p-glucose, p-insulin, NT-proBNP, hemoglobin, potassium, sodium, creatinine, albumine

Intervention type: OTHER
Intervention: Urine analyses
Description: 24-hour urine collections with determination of u-sodium, u-potassium and u-creatinine.

Intervention type: OTHER
Intervention: Urine analyses
Description: 24-hour urine collections with determination of u-sodium, u-potassium and u-creatinine.

Intervention type: OTHER
Intervention: Urine analyses
Description: 24-hour urine collections with determination of u-sodium, u-potassium and u-creatinine.

Intervention type: DIETARY_SUPPLEMENT
Intervention: Diets with low and high sodium content
Description: Participants are subjected to 5 days of low (90 mmol/day) and high (250 mmol/day) sodium intake in a randomized order before and 1 year after laparoscopic gastric bypass surgery.

Intervention type: DIETARY_SUPPLEMENT
Intervention: Diets with low and high sodium content
Description: Participants are subjected to 5 days of low (90 mmol/day) and high (250 mmol/day) sodium intake in a randomized order before and 1 year after laparoscopic gastric bypass surgery.

Intervention type: DIETARY_SUPPLEMENT
Intervention: Diets with low and high sodium content
Description: Participants are subjected to 5 days of low (90 mmol/day) and high (250 mmol/day) sodium intake in a randomized order before and 1 year after laparoscopic gastric bypass surgery.