Effect of Thoracic Paravertebral Block on Heart Rate Variability (HRV)

Larissa University Hospital

Status: Unknown

Conditions: Thoracic Paravertebral Block; Breast Surgery; Autonomic Nervous System; HRV

Treatments: Other: Right thoracic paravertebral block; Other: Left thoracic paravertebral block

Study type: Observational

Funder types: Other

Identifiers

NCT01755910

HRV Thoracic paravertebral

Details and patient eligibility

About

The Left thoracic paravertebral block have a different effect on heart's autonomic nervous system, as measured with Heart Rate Variability, compared to Right interscalene block

Enrollment: 100 estimated patients

Sex: Female

Ages: 20 to 65 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Elective breast surgery
• Age 20 - 65 years
• ASA I - II

Exclusion criteria

• Coagulopathy disorders
• Infection at the puncture site for the thoracic paravertebral block
• Severe kyphoscoliosis
• Allergy to local anesthetics
• BMI > 35
• Psychiatric disorders
• Patient's refusal
• Problems with patient communication
• Arrythmia
• Ischaemic heart disease
• Diabetes mellitus
• Thyroid function disorders
• Patients with conduction disorders on the ECG
• Electrolyte disorders (K+, Na+, Ca++)
• Patients on medication that affect the ECG

Trial design

100 participants in 2 patient groups

Left thoaracic paravertebral block

Description:

Surgery in the left breast under left thoracic paravertebral block and HRV

Treatment:

Other: Left thoracic paravertebral block

Right thoracic paravertebral block and HRV

Description:

Surgery in the right breast under right thoracic paravertebral block and HRV

Treatment:

Other: Right thoracic paravertebral block