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- Heart_block abstract "Heart block is a disease or inherited condition that causes a fault within the heart's natural pacemaker due to some kind of obstruction (or "block") in the electrical conduction system of the heart. Despite the severe-sounding name, heart block may often cause no symptoms at all in some cases, or occasional missed heartbeats in other cases (which can cause lightheadedness, syncope (fainting), and palpitations), or may require an artificial pacemaker to be implanted, depending upon exactly where in the heart conduction is being impaired and how significantly it is affected. Heart block has nothing to do with coronary heart disease, which damages the heart's blood vessels and can cause angina (chest pain) or myocardial infarction (heart attack). In severe cases where the hearts ability to control and trigger heartbeats may be completely ineffective or unreliable, heart block can usually be treated by inserting an artificial pacemaker, a medical device that provides correct electrical impulses to trigger heart beats, compensating for the natural pacemaker's unreliability. Therefore, heart block frequently has no effects, or mild and occasional effects, and is not life-threatening in the vast majority of cases, and is usually treatable in more serious cases. The human heart uses electrical signals to maintain and initiate the regular heart beat in a living person; incorrect conduction can lead to mild or serious symptoms depending upon the location of the blockage and how severely conduction is being blocked. Conduction is initiated by the sinoatrial node ("sinus node" or "SA node"), and then travels to the atrioventricular node ("AV node") which also contains a secondary "pacemaker" that acts as a backup for the SA nodes, then to the bundle of His and then via the bundle branches to the point of the apex of the fascicular branches (shown in the diagram on the right). Blockages are therefore classified based on where the blockage occurs - namely the SA node ("Sinoatrial block"), AV node ("AV block" or AVB), and at or below the bundle of His ("Intra-Hisian" or "Infra-Hisian block" respectively). Infra-Hisian blocks may occur at the left or right bundle branches ("bundle branch block") or the fascicles of the left bundle branch ("fascicular block" or "Hemiblock"). SA and AV node blocks are each divided into three degrees, with second degree blocks being divided into two types (written either "type I or II" or "type 1 or 2"). The term "Wenckebach block" is also used for second degree type 1 blocks of either the SA or AV node; in addition second degree blocks type 1 and 2 are also sometimes known as "Mobitz 1" and "Mobitz 2".Clinically speaking, the blocks tend to have more serious potential the closer they are to the 'end' of the electrical path (the muscles of the heart regulated by the heartbeat), and less serious effects the closer they are to the 'start' (at the SA node), because the potential disruption becomes greater as more of the 'path' is 'blocked' from its 'end' point. Therefore, most of the important heart blocks are AV nodal blocks and infra-Hisian blocks. SA blocks are usually of lesser clinical significance, since in the event of SA block, the AV node contains a secondary pacemaker which would still maintain a heart rate of around 40 - 60 beats per minute, sufficient for consciousness and much of daily life in the majority of individuals.".
- Heart_block icd10 "I44-I45".
- Heart_block icd9 "426.9".
- Heart_block meshId "D006327".
- Heart_block thumbnail ConductionsystemoftheheartwithouttheHeart-en.svg?width=300.
- Heart_block wikiPageID "672768".
- Heart_block wikiPageLength "9452".
- Heart_block wikiPageOutDegree "53".
- Heart_block wikiPageRevisionID "682027241".
- Heart_block wikiPageWikiLink AV_block.
- Heart_block wikiPageWikiLink AV_node.
- Heart_block wikiPageWikiLink Angina_pectoris.
- Heart_block wikiPageWikiLink Artificial_cardiac_pacemaker.
- Heart_block wikiPageWikiLink Atrioventricular_block.
- Heart_block wikiPageWikiLink Atrioventricular_node.
- Heart_block wikiPageWikiLink Bundle_branch.
- Heart_block wikiPageWikiLink Bundle_branch_block.
- Heart_block wikiPageWikiLink Bundle_branches.
- Heart_block wikiPageWikiLink Bundle_of_His.
- Heart_block wikiPageWikiLink Cardiac_cycle.
- Heart_block wikiPageWikiLink Cardiac_ectopy.
- Heart_block wikiPageWikiLink Cardiac_pacemaker.
- Heart_block wikiPageWikiLink Category:Cardiac_dysrhythmia.
- Heart_block wikiPageWikiLink Consciousness.
- Heart_block wikiPageWikiLink Coronary_artery_disease.
- Heart_block wikiPageWikiLink Coronary_heart_disease.
- Heart_block wikiPageWikiLink Ectopic_beat.
- Heart_block wikiPageWikiLink Electrical_conduction_system_of_the_heart.
- Heart_block wikiPageWikiLink First-degree_atrioventricular_block.
- Heart_block wikiPageWikiLink Heart.
- Heart_block wikiPageWikiLink Heart_block.
- Heart_block wikiPageWikiLink Hemiblock.
- Heart_block wikiPageWikiLink Infra-Hisian_block.
- Heart_block wikiPageWikiLink Intra-Hisian_block.
- Heart_block wikiPageWikiLink Karel_Frederik_Wenckebach.
- Heart_block wikiPageWikiLink Left_anterior_fascicular_block.
- Heart_block wikiPageWikiLink Left_posterior_fascicular_block.
- Heart_block wikiPageWikiLink Muscle_fascicle.
- Heart_block wikiPageWikiLink Myocardial_infarction.
- Heart_block wikiPageWikiLink Palpitation.
- Heart_block wikiPageWikiLink Palpitations.
- Heart_block wikiPageWikiLink Right_bundle_branch_block.
- Heart_block wikiPageWikiLink Second-degree_atrioventricular_block.
- Heart_block wikiPageWikiLink Sinoatrial_block.
- Heart_block wikiPageWikiLink Sinoatrial_node.
- Heart_block wikiPageWikiLink Syncope_(medicine).
- Heart_block wikiPageWikiLink Third-degree_atrioventricular_block.
- Heart_block wikiPageWikiLink Woldemar_Mobitz.
- Heart_block wikiPageWikiLink File:Complete_A-V_block_with_resulting_junctional_escape.png.
- Heart_block wikiPageWikiLink File:ConductionsystemoftheheartwithouttheHeart-en.svg.
- Heart_block wikiPageWikiLink File:Sinus_rhythm_with_3-to-2_and_2-to-1_Type_II_A-V_block.png.
- Heart_block wikiPageWikiLink File:Type_I_A-V_block_5-to-4_Wenckebach_periods.png.
- Heart_block wikiPageWikiLinkText "AV block".
- Heart_block wikiPageWikiLinkText "AV node block".
- Heart_block wikiPageWikiLinkText "Heart block".
- Heart_block wikiPageWikiLinkText "Heart_block#Types".
- Heart_block wikiPageWikiLinkText "SA node or AV conduction disturbances".
- Heart_block wikiPageWikiLinkText "cardiac conduction abnormalities".
- Heart_block wikiPageWikiLinkText "conduction block".
- Heart_block wikiPageWikiLinkText "congenital heart block".
- Heart_block wikiPageWikiLinkText "heart block".
- Heart_block wikiPageWikiLinkText "heart-block".
- Heart_block wikiPageWikiLinkText "left anterior bundle branch block".
- Heart_block diseasesdb "10477".
- Heart_block hasPhotoCollection Heart_block.
- Heart_block icd "426.9".
- Heart_block icd "I44-I45".
- Heart_block meshid "D006327".
- Heart_block name "Heart block".
- Heart_block wikiPageUsesTemplate Template:Circulatory_system_pathology.
- Heart_block wikiPageUsesTemplate Template:Infobox_disease.
- Heart_block subject Category:Cardiac_dysrhythmia.
- Heart_block hypernym Disease.
- Heart_block type Article.
- Heart_block type Disease.
- Heart_block type Article.
- Heart_block type Thing.
- Heart_block type Q12136.
- Heart_block comment "Heart block is a disease or inherited condition that causes a fault within the heart's natural pacemaker due to some kind of obstruction (or "block") in the electrical conduction system of the heart.".
- Heart_block label "Heart block".
- Heart_block sameAs إحصار_القلب.
- Heart_block sameAs بلوک_قلبی.
- Heart_block sameAs 房室ブロック.
- Heart_block sameAs Bloqueio_de_ramo.
- Heart_block sameAs m.031q2c.
- Heart_block sameAs Блокада_сердца.
- Heart_block sameAs இதய_அடைப்பு.
- Heart_block sameAs Q2988775.
- Heart_block sameAs Q2988775.
- Heart_block wasDerivedFrom Heart_block?oldid=682027241.
- Heart_block depiction ConductionsystemoftheheartwithouttheHeart-en.svg.
- Heart_block isPrimaryTopicOf Heart_block.
- Heart_block name "Heart block".