Related Experiment Video
Updated: Jun 12, 2025
10:17
Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
Published on: April 11, 2025
430
Which vacuum phenomenon is more predictive for future junctional disorders?: Intradiscal or Intrafacet?
Murat Şakir Ekşi1, Jülide Hazneci2, Arda Topçu2
1Health Sciences University, School of Medicine, Department of Neurosurgery, Istanbul, Turkey; FSM Training and Research Hospital, Neurosurgery Clinic, Istanbul, Turkey.
Summary
Vacuum phenomenon (VP) can predict junctional disorders after lumbar fusion for degenerative spine disorders. Intrafacet VP is a stronger predictor than intradiscal VP, aiding surgical planning to reduce complications.
Area of Science:
- Orthopedics
- Neurosurgery
- Radiology
Background:
- Spine studies have explored the link between vacuum phenomenon (VP) and spinal instability.
- However, a direct association between VP and junctional disorders post-fusion for degenerative lumbar spine disorders (DSDs) remains underreported.
Purpose of the Study:
- To investigate if vacuum phenomenon (VP) predicts junctional disorders in patients undergoing short-segment lumbar decompression and fusion for DSDs.
- To determine the relative importance of intradiscal versus intrafacet VP in predicting these disorders.
Main Methods:
- Retrospective review of a prospectively collected database of patients who underwent short-segment lumbar decompression and fusion for DSDs.
- Pre-operative CT scans were analyzed for intradiscal and intrafacet VP, with scores assigned.
- Total VP scores were calculated and correlated with the incidence of junctional disorders at follow-up.
Main Results:
- Patients who developed junctional disorders showed significantly higher total and intrafacet VP scores.
- Total VP score (OR 1.217, p=0.014) and intrafacet VP score (OR 1.465, p=0.008) were predictive of junctional disorders.
- ROC analysis identified cut-off values of 1.5 for total VP and 0.5 for intrafacet VP scores.
Conclusions:
- Vacuum phenomenon (VP) is associated with junctional disorders following short-segment lumbar decompression and fusion for DSDs.
- Intrafacet VP is a more significant predictor of junctional disorders than intradiscal VP.
- Pre-operative evaluation of both intradiscal and intrafacet VP is crucial for surgical planning to mitigate the risk of junctional disorders.
Related Concept Videos
01:19Electrophysiology of Normal Cardiac Rhythm
2.3K
The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
2.3K
01:28Mechanism of Cardiac Arrhythmias
899
Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
899
01:28Electrocardiogram Fundamentals
543
Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
543
01:28Disturbances in Heart Rhythm
916
Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
Arrhythmias are categorized by their speed, rhythm, and origin. A slow...
916
01:41Action Potentials
130.3K
Overview
130.3K
01:30Cardiac Action Potential
1.1K
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
1.1K