Effect of Interscalene Block on Heart Rate Variability (HRV)

Larissa University Hospital

Status: Completed

Conditions: Shoulder Surgery; Interscalene Block; Beach Chair Position; Autonomic Nervous System; HRV

Study type: Observational

Funder types: Other

Identifiers

NCT01185457

HRVShoulder

Details and patient eligibility

About

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

Enrollment: 50 estimated patients

Sex: All

Ages: 20 to 45 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• elective shoulder surgery
• Age 20- 45 years old
• ASA I - II

Exclusion criteria

• Coagulopathy disorders
• Infection at the puncture site for the interscalene block
• Neurologic deficit in the arm that is going to be operated
• 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

50 participants in 2 patient groups

Left interscalene block

Description:

Left shoulder surgery under left interscalene block and HRV

Right interscalene block

Description:

Right shoulder surgery under right interscalene block and HRV