CHADS stands for congestive heart failure, hypertension, age>75y, diabetes mellitus, prior stroke and TIA. The first four risk factors are worth 1 point each, and the last one is worth 2 points.
If the CHADS2 score is 0, the risk level is low, the stroke incidence rate is 1.0%/y, and aspirin 75-150mg/d can be used to prevent it. The score is 1 point, the risk level is low-moderate, the incidence of stroke is 1.5%/y, and warfarin (INR 2-3) or aspirin 75-150 mg/d can be used. This can be selected based on the patient's wishes, bleeding risk, and INR testing conditions. If the score is 2 points, the risk level is medium, and the stroke incidence rate is 2.5%/year, warfarin (INR 2-3) needs to be used. This also needs to be selected based on the patient's wishes, bleeding risk, and INR testing conditions. If the score is 3 points, the risk level is high and the stroke incidence rate is 5%/year, warfarin (INR 2-3) is required. If the patient is older than 75 years old, the risk of bleeding in elderly patients is twice as high as that in younger patients, and the INR It can be controlled at 1.6-2.5. At the same time, patients with poorly controlled blood pressure should also pay attention to the risk of bleeding. If the score is greater than 4 points, the risk level is very high, and the stroke incidence rate is >7%/y. In addition, once a cerebral infarction occurs in patients taking warfarin anticoagulation, thrombolysis is often impossible because the INR is generally greater than 1.4.
Risk factors
Score
C (Congestive heart failure)
Congestive heart failure
1
H (Hypertension)
The blood pressure is persistently higher than 140/90mmHg or receiving antihypertensive drug treatment.
1
A(Age)
Age greater than 75 years old
1
D(Diabetes Mellitus)
Diabetes
1
S2 (Prior Stroke or TIA)
Previous history of stroke or TIA
2
CHADS2 score
(The maximum possible score is 6 points, 0-1 points are low risk, 2-3 points are medium risk, and 4-6 points are high risk)
The CHADS2? score is a stroke risk assessment tool for patients with non-rheumatic atrial fibrillation. The results can be used as a reference for anticoagulation or antiplatelet therapy. A high score represents a high stroke risk, and a low score represents a low stroke risk.