Related Experiment Video

Updated: Aug 7, 2026

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage
10:34

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage

Published on: August 30, 2020

Right sylvian fissure subarachnoid hemorrhage has electrocardiographic consequences

Y Hirashima1, S Takashima, N Matsumura

  • 1Department of Neurosurgery, Toyama Medical and Pharmaceutical University, Toyama, Japan. yhira@ms.toyama-mpu.ac.jp

Stroke
|October 6, 2001
PubMed

Insights

Subarachnoid hemorrhage (SAH) can cause abnormal ECG changes, particularly with high blood pressure or bleeding in the right sylvian fissure. These findings highlight potential cardiac risks in SAH patients.

Area of Science:

  • Neurology
  • Cardiology
  • Radiology

Background:

  • Subarachnoid hemorrhage (SAH) is often associated with abnormal electrocardiogram (ECG) findings.
  • The right insular cortex is implicated in sympathetic cardiovascular regulation.

Purpose of the Study:

  • To investigate the laterality and location of SAH in relation to ECG, blood pressure, and heart rate changes.
  • To determine if SAH location influences cardiovascular alterations.

Main Methods:

  • Studied 118 SAH patients, excluding those deceased within 1 month.
  • Collected blood pressure and pulse data on admission.
  • Assessed ECG changes on admission and at 1 month.
  • Quantified SAH in 8 cisterns/fissures using brain CT scans.

Main Results:

  • 26 patients (22%) had abnormal admission ECGs.
  • Higher systolic and diastolic blood pressure, and greater SAH volume in specific cisterns (e.g., right sylvian fissure) were linked to ECG changes.
  • Multivariate analysis identified elevated systolic blood pressure (>160 mm Hg) and SAH in the quadrigeminal cistern and right sylvian fissure as independent predictors of abnormal ECGs.

Conclusions:

  • Cardiac complications may occur in SAH patients with significant right sylvian fissure bleeding.
  • Elevated systolic blood pressure (>160 mm Hg) is a key factor associated with cardiac consequences in SAH.
Abstract

More Related Videos

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model09:14

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Published on: June 18, 2021

Imaging Vital and Non-vital Brain Pericytes in Brain Slices following Subarachnoid Hemorrhage05:11

Imaging Vital and Non-vital Brain Pericytes in Brain Slices following Subarachnoid Hemorrhage

Published on: August 18, 2023

Related Concept Videos

Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per minute.
Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

Aneurysm II: Clinical Manifestations and Diagnostic Studies

Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
Stroke: Introduction and Types01:29

Stroke: Introduction and Types

A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...