Pathological sub-types, risk factors and outcome of stroke at the Nairobi Hospital, Kenya

J O Jowi1, P M Mativo

  • 1Department of Medicine, Aga Khan University Hospital, Nairobi, P.O. Box 30270-00100, Nairobi, Kenya.

Insights

This study found ischemic stroke to be the most common type, with hypertension as the leading risk factor in Nairobi. The in-hospital stroke prevalence was 3042/100,000, with most patients discharged.

Area of Science:

  • Neurology
  • Epidemiology
  • Public Health

Background:

  • Stroke is a leading cause of death and disability globally.
  • Risk factors like hypertension, diabetes, and smoking are prevalent, especially in tropical regions.
  • Co-morbidities such as HIV/AIDS and sickle cell disease are increasingly observed.

Purpose of the Study:

  • To determine the pathological subtypes of stroke.
  • To identify prevalent risk factors and co-morbidities associated with stroke.
  • To ascertain the in-hospital period prevalence and outcomes of stroke patients.

Main Methods:

  • A hospital-based retrospective study was conducted at The Nairobi Hospital.
  • Data from 80 patients diagnosed with stroke (cerebral vascular accident) between 18 and 95 years old were analyzed.
  • WHO diagnostic criteria were used for stroke diagnosis.

Main Results:

  • Ischemic stroke accounted for 85% of cases, with hypertension (80%) and diabetes mellitus (33.7%) as primary risk factors.
  • The in-hospital period prevalence of stroke was 3042/100,000.
  • The mean hospital stay was 12.5 days, with a 93.8% discharge rate and a 5% in-hospital mortality rate.

Conclusions:

  • Ischemic stroke is the most common subtype in this study population.
  • Hypertension is the predominant risk factor for stroke.
  • The study highlights a significant in-hospital stroke prevalence and generally favorable outcomes with timely management.
Abstract

Related Concept Videos

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...
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...
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
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 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...