Electrocardiographic Changes in Cholecystectomy Surgery

NCT ID: NCT06651450

Last Updated: 2025-11-18

Basic Information

• Recruitment Status: ENROLLING_BY_INVITATION
• Total Enrollment: 48 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2024-09-01
• Study Completion Date: 2025-12-01

Brief Summary

Laparoscopic (closed) surgery provides several advantages over open surgery, such as smaller surgical incisions, postoperative recovery, and shorter hospital stay. However, increased intra-abdominal pressure (IAP) during surgery may have adverse effects on some systems such as circulation and respiration. Increased IAP may reduce blood return to the heart. Some studies have shown that some values calculated from surface electrocardiography are associated with changes in heart rhythm. Changes in blood pressure, nervous, and hormonal systems that may be seen due to increased IAP in laparoscopic surgery may cause arrhythmias in patients.Therefore, researchers aimed to investigate the effects of increased IAP on electrocardiography in patients undergoing laparoscopic cholecystectomy.

Detailed Description

Laparoscopic cholecystectomy has been shown to have advantages such as less postoperative pain, early onset of bowel movements, shortening of hospital stay, early return to daily activities and better aesthetic results compared to open surgery. However, increased intra-abdominal pressure (IAP) can negatively affect the respiratory, circulatory, neuroendocrine and central nervous systems. Increased IAP can compress the vena cava and abdominal aorta, causing deterioration in the perfusion of other organs, especially the kidneys and spleen. In addition, this pathological process reduces the preload of the heart, stroke volume, cardiac output and increases central venous pressure, pulmonary capillary wedge pressure, pulmonary artery pressure and left ventricular afterload. IAP can also affect the pressure in the coronary arteries and impair the nutrition of the heart. It should be noted that increased IAP has also been identified as an independent risk factor for mortality in critically ill patients. The QT interval, which represents the time required for ventricular depolarization and repolarization on the ECG, is the time interval from the beginning of the QRS complex to the end of the T wave. Since the Qt interval is affected by the heart rate, it is called QT corrected according to the heart rate, QTc. Prolongation of the peroperative QT and QTc intervals can result in serious complications such as serious arrhythmias, ventricular tachycardia, ventricular fibrillation, and cardiac arrest. Variable QT intervals have been associated with heterogeneous repolarization and ventricular arrhythmias. The frontal plane QRS-T angle is expressed as the absolute difference between the QRS and T wave axes. The frontal plane QRS-T angle, a parameter that can be easily calculated from the 12-lead surface ECG, is considered a marker of ventricular repolarization heterogeneity. Increased ventricular repolarization heterogeneity is associated with an increased risk of arrhythmogenesis. Studies have shown that increased frontal plane QRS-T angle leads to an increased risk of cardiovascular and arrhythmic events and is associated with an increased risk of mortality. Previous publications have reported that the frontal plane QRS-T angle value is stronger, more renewable, and less affected by external factors than the QT/QTc value in showing ventricular repolarization. A wider frontal plane QRS-T angle is considered a strong and independent risk indicator for cardiac morbidity and mortality compared to other traditional cardiovascular risk factors such as the length of the QT interval and electrocardiographic risk indicators. The increase in IAP in laparoscopic surgeries, anesthetic drugs, patient positions, and neuroendocrine response may increase the risk of arrhythmia in the patient. There are many studies on the effects of laparoscopic surgeries, anesthetic drugs, and anesthesia methods that increase IAP on the QT/QTc duration, and there are a limited number of studies in the literature on the effects of another repolarization parameter, the frontal plane QRS-T angle. In this study, researchers investigated perioperative frontal QRS-T angle change and risk of arrhythmia predisposition in patients undergoing laparoscopic cholecystectomy under general anesthesia.

Conditions

Laparoscopic Cholecystectomy; Vector Electrocardiography

Study Design

• Observational Model Type: OTHER
• Study Time Perspective: PROSPECTIVE

Study Groups

Patients who underwent laparoscopic cholecystectomy surgery

Effects of increasing IAB on frontal plane QRS-T angle, QT and QTc in ECG at different stages of surgery

No interventions assigned to this group

Eligibility Criteria

Inclusion Criteria

• Patients aged 18-65 who wish to participate in the study and undergo laparoscopic cholecystectomy

Exclusion Criteria

• Cardiovascular diseases (coronary artery disease, atrial fibrillation, atrial flutter, heart failure, pacemaker, ICD, CRT, bundle branch block)
• Serious respiratory diseases
• Electrolyte disorders
• Renal failure
• Metabolic diseases
• Advanced psychiatric diseases

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Tokat Gaziosmanpasa University

OTHER

Sponsor Role: lead

Responsible Party

Ali Genc

Assistant professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Tokat Gaziosmanpasa University

Tokat Province, Center, Turkey (Türkiye)

Countries

Turkey (Türkiye)

References

Genc A, Ozsoy U, Sahin AT, Gurler Balta M, Kolukcu V, Genc Tapar G, Karaman T, Karaman S. Intra-abdominal hypertension and reverse Trendelenburg position increase frontal QRS-T angle in laparoscopic cholecystectomy: An observational study. Medicine (Baltimore). 2025 Mar 14;104(11):e41934. doi: 10.1097/MD.0000000000041934.

Reference Type: DERIVED

PMID: 40101078 (View on PubMed)

Other Identifiers

24-KAEK-215

Identifier Type: -

Identifier Source: org_study_id