Bundle branch block [[Image:{{{Image}}}|190px|center|]]
| | ICD-10 | I44.4-I44.7, I45 | | ICD-O: | {{{ICDO}}} | | ICD-9 | 426.3-426.5 | | OMIM | {{{OMIM}}} The following codes are used with International Statistical Classification of Diseases and Related Health Problems. ...
The International Classification of Diseases for Oncology (ICD-O) is a domain specific extension of the International Statistical Classification of Diseases and Related Health Problems for tumor diseases. ...
The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ...
The Mendelian Inheritance in Man project is a database that catalogues all the known diseases with a genetic component, and - when possible - links them to the relevant genes in the human genome. ...
| | MedlinePlus | {{{MedlinePlus}}} | | eMedicine | {{{eMedicineSubj}}}/{{{eMedicineTopic}}} | | DiseasesDB | {{{DiseasesDB}}} | Bundle branch block refers to a disorder of the heart's electrical conducting system. MedlinePlus (medlineplus. ...
eMedicine is an online clinical medical knowledge base that was founded in 1996. ...
The Diseases Database is a free website that provides information about the relationships between medical conditions, symptoms, and medications. ...
The heart and lungs (from an older edition of Grays Anatomy) The heart (Latin cor) is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. ...
The normal electrical conduction in the heart allows the impulse that is generated by the SA node of the heart to be propagated to (and stimulate) the myocardium (muscle of the heart). ...
Normal Bundle Branch Function
The heart's electrical activity normally starts in the sinoatrial node of the upper right atrium (the heart's built-in "pacemaker"), and travels to the atrioventricular node. From the AV node the electrical impulse travels down the Bundle of His, and divides into two branch bundles, one for each ventricle. The sinoatrial node (abbreviated SA node, also called the sinus node) is the impulse generating (pacemaker) tissue located in the right atrium of the heart. ...
In Anatomy, atrium refers to a structure of the heart. ...
This article is about the natural pacemaker in the heart. ...
The atrioventricular node (abbreviated AV node) is the tissue between the atria and the ventricles of the heart, which conducts the normal electrical impulse from the atria to the ventricles. ...
The bundle of His is a bundle of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node to the cells of the ventricles, causing cardiac muscles in the ventricles to contract. ...
The function of the bundles is to speed the electrical impulse and distribute it in a pattern which makes later heart muscle contraction forceful and coordinated. As electrical impulses travel down these bundles, they spread over the associated ventricle to the muscle fibers, stimulating the fibers to contract in a rhythmic manner, squeezing blood out of the ventricles and into the arterial circulation. A muscle fiber (American usage) or muscle fibre (British usage) is a single cell of a muscle. ...
Section of an artery An arterial road is a class of highway. ...
Because the left ventricle is larger, the left bundle divides into an anterior left bundle and a posterior left bundle, the former controlling the front wall of the left ventricle, and the latter controlling the back wall of the left ventricle.
Bundle Branch Blocks When bundles are injured, as in a myocardial infarction, or because of underlying heart disease, a bundle or a branch of a bundle may cease normal function. The result is an altered pathway for electrical heart activity. Since an electrical impulse can no longer use the bundle to travel, it may move instead through muscle fibers in a way that both slows the electrical movement and changes the direction of the impulses. As a result, the ability of the ventricles to effectively pump blood is impaired, and cardiac output — the amount of blood the ventricles can pump into the arterial circulation — is reduced. A myocardial infarction occurs when an atherosclerotic plaque slowly builds up in the inner lining of a coronary artery and then suddenly ruptures, totally occluding the artery and preventing blood flow downstream. ...
There are different forms of heart disease: Coronary heart disease Ischaemic heart disease Cardiovascular disease The study of the heart (and diseases of the heart) is Cardiology This is a disambiguation page, a list of pages that otherwise might share the same title. ...
Diagnosis and Treatment Bundle branch blocks can commonly be diagnosed by the shape and width of the QRS complex on the EKG (ECG). Right bundle branch blocks typically cause some prolongation of the last part of the QRS wave complex, and may cause the heart's electrical axis to be more rightward. Left bundle branch blocks widen the entire QRS, making the EKG look quite abnormal, and may move the heart's electrical axis dramatically leftward. ECG may also refer to the East Coast Greenway Lead II An Electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm) is a graphic produced by an electrocardiograph, which records the electrical voltage in the heart in the form of a continuous strip graph. ...
Many people with bundle branch blocks may still be quite active, and may have nothing more remarkable than an abnormal appearance to their EKG. However, when bundle blocks are complex and diffuse in the bundle systems, or associated with additional and significant ventricular muscle damage, they may be a sign of serious underlying heart disease. In more severe cases, a pacemaker may be required to re-establish better heart muscle function. This article is about a medical device which electrically stimulates the heart. ...
See also The normal electrical conduction in the heart allows the impulse that is generated by the SA node of the heart to be propagated to (and stimulate) the myocardium (muscle of the heart). ...
This article is about the natural pacemaker in the heart. ...
A heart block denotes a disease in the electrical system of the heart. ...
First degree heart block is a disease of the electrical conduction system of the heart. ...
Trifascicular heart block is the triad of first degree heart block, right bundle branch block, and either left anterior or left posterior heart block seen on an electrocardiogram (EKG). ...
Second degree heart block is a disease of the electrical conduction system of the heart. ...
Third degree heart block, also known as complete heart block, is a disease of the electrical system of the heart, in which the impulse generated in the top half of the heart (typically the SA node in the right atrium) does not propagate to the left or right ventricles. ...
Reference - Cecil Textbook of Medicine. W.B. Sanders. 2004. Chapters 50; 58.
- Rakel: Textbook of Family Practice, 6th ed., 2002 W. B. Saunders Company. pp. 699-732.
| Cardiovascular system - Heart | | | Pericardium - Epicardium - Myocardium - Endocardium - Cardiac pacemaker - Sinoatrial node - Atrioventricular node - Bundle of His - Purkinje fibers - Heart valves The circulatory system or cardiovascular system is the organ system which circulates blood around the body of most animals. ...
The heart and lungs (from an older edition of Grays Anatomy) The heart (Latin cor) is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. ...
The pericardium is a double-walled sac that contains the heart and the roots of the great vessels. ...
Epicardium describes the outer layer of heart tissue (from Greek; epi- outer, cardium heart). ...
Myocardium is the muscular tissue of the heart. ...
In the heart, the endocardium is the innermost layer of cells, embryologically and biologically similar to the endothelium that lines blood vessels. ...
This article is about the natural pacemaker in the heart. ...
The sinoatrial node (abbreviated SA node, also called the sinus node) is the impulse generating (pacemaker) tissue located in the right atrium of the heart. ...
The atrioventricular node (abbreviated AV node) is the tissue between the atria and the ventricles of the heart, which conducts the normal electrical impulse from the atria to the ventricles. ...
The bundle of His is a bundle of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node to the cells of the ventricles, causing cardiac muscles in the ventricles to contract. ...
Purkinje fibers (or Purkyne tissue) are located in the inner ventricular walls of the heart, just beneath the endocardium. ...
In anatomy, the heart valves are valves in the heart that limits blood flow to a single direction by opening and closing depending on the difference in pressure on each side. ...
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