, Stroke Risk factors
• Hypertensio
• Diabetes
• Hyperlipidem
Brain Attack • Smoking
Symptoms resolve >= 24h or persist => Stroke
< 24h => TIA (Transient Ischemic Attack)
Ischemic (80%)
1. Thrombotic
-Local in situ obstruction of an artery
-Large vessel disease: MCA, ACA, vertebral artery,
basilar artery
-Small vessel disease: lacunar stroke
-Symptoms fluctuate
2. Embolic
-Cardiac (atrial fibrillation, left ventricular thrombus)
-Artery to artery: carotid artery
-Multiple territories on imaging
-Sudden onset of symptoms
-Symptoms may wane over time
3. Hypoperfusion
-Due to low blood flow (heart failure, shock).
-Affects watershed areas in the brain.
Hemorrhagic (20%)
-Intraparenchymal Bleed
-Sudden onset
-Symptoms increase gradually Over min or hrs
- ICP => headache, vomiting Hemorrhagic Stroke
Causes of hemorrhagic stroke: (bright/hyperdense)
• Ischemic Stroke with Reperfusion
• Hypertensio
• Diabetes
• Hyperlipidem
Brain Attack • Smoking
Symptoms resolve >= 24h or persist => Stroke
< 24h => TIA (Transient Ischemic Attack)
Ischemic (80%)
1. Thrombotic
-Local in situ obstruction of an artery
-Large vessel disease: MCA, ACA, vertebral artery,
basilar artery
-Small vessel disease: lacunar stroke
-Symptoms fluctuate
2. Embolic
-Cardiac (atrial fibrillation, left ventricular thrombus)
-Artery to artery: carotid artery
-Multiple territories on imaging
-Sudden onset of symptoms
-Symptoms may wane over time
3. Hypoperfusion
-Due to low blood flow (heart failure, shock).
-Affects watershed areas in the brain.
Hemorrhagic (20%)
-Intraparenchymal Bleed
-Sudden onset
-Symptoms increase gradually Over min or hrs
- ICP => headache, vomiting Hemorrhagic Stroke
Causes of hemorrhagic stroke: (bright/hyperdense)
• Ischemic Stroke with Reperfusion
