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2. Collateral circulation - Wikipedia

   en.wikipedia.org/wiki/Collateral_circulation

   Collateral circulation is the alternate circulation around a blocked artery or vein via another path, such as nearby minor vessels. [1] It may occur via preexisting vascular redundancy (analogous to engineered redundancy), as in the circle of Willis in the brain, or it may occur via new branches formed between adjacent blood vessels (neovascularization), as in the eye after a retinal embolism ...

3. Right bundle branch block - Wikipedia

   en.wikipedia.org/wiki/Right_bundle_branch_block

   The criteria to diagnose a right bundle branch block on the electrocardiogram: The heart rhythm must originate above the ventricles (i.e., sinoatrial node, atria or atrioventricular node) to activate the conduction system at the correct point. The QRS duration must be more than 100 ms (incomplete block) or more than 120 ms (complete block). [9]

4. Heart block - Wikipedia

   en.wikipedia.org/wiki/Heart_block

   Infra-Hisian block is that of the distal conduction system. Types of infra-Hisian block include: Type 2 second degree heart block (Mobitz II) – a type of AV block due to a block within or below the bundle of His [5] Left anterior fascicular block; Left posterior fascicular block; Right bundle branch block; Left bundle branch block

5. Bundle branch block - Wikipedia

   en.wikipedia.org/wiki/Bundle_branch_block

   A right bundle branch block typically causes prolongation of the last part of the QRS complex and may shift the heart's electrical axis slightly to the right. The ECG will show a terminal R wave in lead V1 and a slurred S wave in lead I. Left bundle branch block widens the entire QRS, and in most cases shifts the heart's electrical axis to the ...

6. Arterial embolism - Wikipedia

   en.wikipedia.org/wiki/Arterial_embolism

   In the heart it can cause myocardial infarction [2] In the brain, it can cause a transient ischemic attack (TIA), [2] and, in prolonged blood obstruction, stroke. [2] Blockage of arteries that supply arms or legs may result in necrosis and gangrene [1] Temporary or permanent decrease or loss of other organ functions [2]

7. Cerebral infarction - Wikipedia

   en.wikipedia.org/wiki/Cerebral_infarction

   Cerebral infarction, also known as an ischemic stroke, is the pathologic process that results in an area of necrotic tissue in the brain (cerebral infarct). [1] In mid to high income countries, a stroke is the main reason for disability among people and the 2nd cause of death. [2]