Transient ischemic attack secondary prevention

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Aysha Anwar, M.B.B.S[2]Maryam Hadipour, M.D.[3]

Overview[edit | edit source]

The secondary prevention strategies for recurrent transient ischemic stroke and ischemic stroke may include the lifestyle modification and treatment of modifiable risk factors.

Secondary prevention[edit | edit source]

The secondary prevention strategies for recurrent transient ischemic stroke and ischemic stroke may include the following:[1][2][3]

Life style modification for secondary prevention[edit | edit source]

Life style modification measures which may help reduce the risk of recurrent stroke and prevent complications may include:

  • Increased physical activity->10 min of exercise such as walking, running, bicycling or swimming >3 times/wk
  • Eating healthy balanced diet. Mediterranean diets are recommended for stroke risk reduction.
  • Smoking cessation
  • Decreased alcohol intake
  • Controlling diseases that are risk factors, including diabetes, hyperlipidemia, and hypertension.

Treatment of modifiable risk factors[edit | edit source]

Blood pressure[edit | edit source]

  • BP control to less than 130/80mm Hg with an angiotensin inhibitor alone or in combination with a diuretic or angiotensin receptor blocker[4]

Diabetes mellitus[edit | edit source]

Hyperlipidemia[edit | edit source]

  • Initiation of statin for hyperlipidemia with goal LDL level<70mg/dL (Please note that the previous guideline suggested LDL level < 110mg/dL or < 90mg/dL but it is now suggested to use highest tolerable dose of statins and PCSK-9 inhibitors to reach the LDL < 70mg/dL level, if tolerable).[4]

Antithrombotic stroke[edit | edit source]

  • Long term antiplatelet therapy with aspirin, dipyrimadole plus aspirin, clopidogrel or aspirin alone[1][3][5][6][4]
  • Anticoagulation not required

Cardioembolic stroke[edit | edit source]

  • Anticoagualtion for atrial fibrillation with Vit K antagonist or NOACs.
  • If intolerant to anticoagulation, aspirin 325 mg or clopidogrel 75 mg (if aspirin intolerant)[3]

TIA with ongoing non Q wave MI or unstable angina[edit | edit source]

  • Use of aspirin(75 mg-100mg) in combination with clopidogrel (75 mg) may be beneficial.[3]
  • An ECG is suggested to perform on any patient, presenting with MI or recurrent TIA or stroke, in order to rule out AF.[4]

Other situations[edit | edit source]

  • Patients having history of TIA undergoing endartectomy may benefit from aspirin (25 to 325mg) before surgery.[3]
  • Because patients with symptomatic high-grade cervical carotid stenosis are candidates for revascularization, it is appropriate to screen for stenosis in any patient who may have such stenosis. Initial testing for carotid stenosis should be done with a noninvasive test such as CTA, MRA, or ultrasonography rather than digital subtraction angiography.[4]

Secondary prevention for specific causes of transient ischemic stroke[7][edit | edit source]

Cause of ischemic stroke Revascularization Multifactorial risk reduction
Carotid endartectomy Carotid stenting Other Surgical options Antiplatelet therapy Statins Antihypertensives Anticoagulants
Large artery disease Carotid Artery Stenosis
Carotid occlusion
Vertebral artery stenosis Angioplasty
Large vessel atherosclerosis Percutaneous transluminal angioplasty ✔✔ ✔✔ ✔✔ ✔✔
Arterial dissection Endovascular surgical repair
Cardiac embolism Atrial fibrillation
Valvular heart disease
Mitral valve disease
Recent MI/ left ventricular thrombus
Heart failure
Dilated cardiomyopathy
Hematological disorders Protein C/S deficiency
Sickle cell disease Repeated blood transfusions and

Hydroxurea

Antithrombin III deficiency
Antiphospholipid antibody syndrome

For AHA/ASA guidelines for the secondary prevention of transient ischemic stroke, please click here

References[edit | edit source]

  1. 1.0 1.1 Yakhkind A, McTaggart RA, Jayaraman MV, Siket MS, Silver B, Yaghi S (2016). "Minor Stroke and Transient Ischemic Attack: Research and Practice". Front Neurol. 7: 86. doi:10.3389/fneur.2016.00086. PMC 4901037. PMID 27375548.
  2. Yaghi S, Elkind MS (2016). "Lipid Control and Beyond: Current and Future Indications for Statin Therapy in Stroke". Curr Treat Options Cardiovasc Med. 18 (4): 27. doi:10.1007/s11936-016-0448-8. PMID 26920158.
  3. 3.0 3.1 3.2 3.3 3.4 Johnston SC, Nguyen-Huynh MN, Schwarz ME, Fuller K, Williams CE, Josephson SA; et al. (2006). "National Stroke Association guidelines for the management of transient ischemic attacks". Ann Neurol. 60 (3): 301–13. doi:10.1002/ana.20942. PMID 16912978.
  4. 4.0 4.1 4.2 4.3 4.4 4.5 Kleindorfer DO, Towfighi A, Chaturvedi S, Cockroft KM, Gutierrez J, Lombardi-Hill D, Kamel H, Kernan WN, Kittner SJ, Leira EC, Lennon O, Meschia JF, Nguyen TN, Pollak PM, Santangeli P, Sharrief AZ, Smith SC, Turan TN, Williams LS (July 2021). "2021 Guideline for the Prevention of Stroke in Patients With Stroke and Transient Ischemic Attack: A Guideline From the American Heart Association/American Stroke Association". Stroke. 52 (7): e364–e467. doi:10.1161/STR.0000000000000375. PMID 34024117 Check |pmid= value (help).
  5. SPS3 Investigators. Benavente OR, Hart RG, McClure LA, Szychowski JM, Coffey CS; et al. (2012). "Effects of clopidogrel added to aspirin in patients with recent lacunar stroke". N Engl J Med. 367 (9): 817–25. doi:10.1056/NEJMoa1204133. PMC 4067036. PMID 22931315. Review in: Ann Intern Med. 2012 Dec 18;157(12):JC6-2
  6. Wang Y, Wang Y, Zhao X, Liu L, Wang D, Wang C; et al. (2013). "Clopidogrel with aspirin in acute minor stroke or transient ischemic attack". N Engl J Med. 369 (1): 11–9. doi:10.1056/NEJMoa1215340. PMID 23803136. Review in: Ann Intern Med. 2013 Oct 15;159(8):JC5 Review in: Evid Based Med. 2014 Apr;19(2):58
  7. Donnan GA, Fisher M, Macleod M, Davis SM (2008). "Stroke". Lancet. 371 (9624): 1612–23. doi:10.1016/S0140-6736(08)60694-7. PMID 18468545.

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