
	Where results make sense

Topic: Mobitz II

Related Topics

Mobitz I

Third degree heart block

First degree heart block

AV node

EKG

Electrocardiogram

Electrical conduction system of the heart

Intravenous therapy

Pool

OpenCable

Submarine

Canadian special forces

Guthfrith

Iphitos

Enthymeme

In the News (Mon 28 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	eMedicine - Heart Block, Second Degree : Article by Michael D Levine
		The Mobitz II second-degree AV block is characterized by an unexpected nonconducted atrial impulse.
		Mobitz type I block is caused by conduction delay in the AV node in 72% of patients and by conduction delay in the His-Purkinje system in the remaining 28%.
		Mobitz type I second-degree AV block is localized to the AV node, and thus is not associated with any increased risk of morbidity or death, in the absence of organic heart disease.
	www.emedicine.com /EMERG/topic234.htm (1911 words)

	eMedicine - Atrioventricular Block : Article by Chirag M Sandesara, MD
		First-degree heart block and second-degree Mobitz I AV block are usually caused by a delay at the AV node level, whereas second-degree Mobitz II AV block is generally caused by blockage in the His bundle or lower in the conduction system.
		Mobitz I (Wenckebach) block also may occur physiologically at high heart rates (especially with pacing) due to increased refractoriness of the AV node, which protects against conducting a fast rhythm to the ventricles.
		Mobitz II with a wide QRS may degenerate into third-degree heart block and is another reason to consider permanent pacing.
	www.emedicine.com /med/topic189.htm (4484 words)

	[No title]
		Mobitz I second degree AV block, or Wenckebach block, is characterized by progressive prolongation of the PR interval causing progressive RR interval shortening until a P wave fails to conduct to the ventricle.
		Mobitz II second degree AV block is characterized by sudden unexpected blocked P waves without variation or necessarily even prolongation of the PR interval.
		Mobitz II block is a more dangerous entity, as it more frequently progresses to complete heart block and cardiovascular collapse.
	www.swcp.com /~tanman/ho/CH-HEARTBLOCK.txt (3081 words)

	eMedicine - Atrioventricular Block, Second Degree : Article by M Silvana Horenstein, MD
		Progressive familial heart block of Mobitz type II is a rare entity that was recently redescribed in which first-degree AV block progresses to second- and third-degree AV block and sometimes to dilated cardiomyopathy.
		Mobitz I (Wenckebach) AV block during recovery from dengue hemorrhagic fever has been reported and may be a transient functional impairment of the AV node in which an altered autonomic tone may play a role (Khongphatthallayothin, 2000).
		Progressive familial heart block of Mobitz type II is a rare autosomal dominant trait in which first-degree AV block progresses to second- and third-degree AV block and, sometimes, to dilated cardiomyopathy with age.
	www.emedicine.com /ped/topic1468.htm (4687 words)

	EMEDU ECG (Site not responding. Last check: 2007-11-06)
		Mobitz II AV block is characterized by sudden unexpected blocked P waves without variation or prolongation of the PR interval.
		Electrophysiological studies have proved that Mobitz II block is due to an infranodal His-Purkinje system conduction delay.
		Mobitz II block most commonly is caused by acute MI (anterior or inferior).
	www.emedu.org /ecg/2t2.htm (72 words)

	UpToDate Second degree atrioventricular block: Mobitz type II
		Mobitz divided second degree AV block as determined by the ECG into two types [1]:
		Type I block described by Wenckebach in which the phenomenon described by Wenckebach was now translated into electrocardiographic terms in which progressive PR interval prolongation preceded a nonconducted P wave.
		Type II block in which the PR interval remained unchanged prior to the P wave that suddenly failed to conduct to the ventricles [1,2].
	patients.uptodate.com /topic.asp?file=carrhyth/14481 (494 words)

	Second degree AV block Mobitz type II (3:1) - Images in Cardiology - Medstudents (Site not responding. Last check: 2007-11-06)
		The ECG shows a three p waves (one of which is inside the T wave, like it was looking upwardws) for every one QRS complex.
		This characteristiscs make the diagnosis of a second degree AV block Mobitz type II.
		Also, the atrial frequency is exactly 100 beats per minute, ruling out the diagnosis of atrial flutter, which requires an atrial frequency above 250 beats per minute.
	www.medstudents.com.br /image/cardio/ecg/mobitz31.htm (141 words)

	Heart Block -- Recommendations and Resources (Site not responding. Last check: 2007-11-06)
		This may be preceded by second degree heart block, particularly Mobitz II heart block.
		Mobitz I heart block is characterized by progressive prolongation of the PR interval on the electrocardiogram (EKG) on consecutive beats followed by a blocked beat (dropped QRS complex).
		Mobitz II heart block is characterized on a surface ECG by a fixed PR interval with a dropped QRS complex after a certain number of P waves.
	www.becomingapediatrician.com /health/70/heart-block.html (1334 words)

	S.A.C.
		Two groups of patients could be identified: group I, consisting of 9 patients in whom the arrhythmia ceased due to a Mobitz I type block in the anterograde "slow" pathway, and group II, composed of 7 patients in whom the arrhythmia ended as a Mobitz II type blockde in the retrograde "fast" pathway.
		Spontaneous interruption of the arrhythmia in the anterograde "slow" pathway in a Mobitz I type modality is in accordance with the well known AV nodal properties of this pathway.
		Conversely, the occurrence of a Mobitz II type blockade in the retrograde "fast" pathway strongly suggests that this pathway involves, at least in part, a fast response tissue.
	www.sac.org.ar /rac/1999/res67(4)3eng.html (406 words)

	Re: bradycardia & pacemakers
		A Mobitz II block is usually intra or infra Hisian and has an increased incidence of progressing to 3° AV block.
		Mobitz Type II Mobitz type II second-degree AV block is less common than type I. The PR interval is constant with a sudden non-conducted P wave (Fig 4).
		Permanent pacing is indicated for Mobitz II AV block and 3° AV block.
	www.medhelp.org /forums/cardio/archive/2294.html (4574 words)

	Second Degree AV Block Type 2 (Site not responding. Last check: 2007-11-06)
		Unlike a type I second degree block, which is primarily a disorder of the AV node, a type II second degree block is a defect more distal in the conduction pathway, for example in the bundle of His or a bilateral bundle branch block.
		So when Mobitz I (the upper conduction system) becomes more severe and prevents any atrial depolarizations from reaching the ventricles (3rd degree block), the part of the heart that takes over and keeps the heart pumping is the next thing normal structure down the conduction line, which is the junctional area.
		However, if Mobitz II (lower conduction system) becomes more severe and prevents any atrial depolarizations from reaching the ventricles, the next distal normal structure to take over pacing is the ventricle itself.
	www.campionambulance.com /staff/second_degree_av_block_type_2.htm (673 words)

	Timeline : ep-history (Site not responding. Last check: 2007-11-06)
		In 1924 Mobitz classified second-degree AV block into type I and type II using the electrocardio-gram.
		The graphic representation of type II block from his publication shows occasional block of one or more P waves with no change in all the PR intervals before and after the non-conducted P waves.The ladder diagrams clearly demonstrate this important constancy of the PR interval.
		Type II block was associated with a constant sinus rate.
	www.hrsonline.org /ep-history/timeline/1920s (1538 words)

	Abnormal ECG in man admitted to ICU with chest pain and irregular pulse - accp-seek board review question of the month ... (Site not responding. Last check: 2007-11-06)
		Mobitz type I, or Wenckebach block, has a better prognosis and will frequently not progress to higher degrees of AV block.
		Type II block most commonly occurs in the setting of anterior infarction, can require temporary or permanent pacing, and is associated with a high mortality, usually due to pump failure.
		In this patient with Mobitz type II second-degree AV block, a temporary and probably permanent ventricular (or AV) pacing wire is indicated because of the high likelihood of further progression of his AV block.
	www.findarticles.com /p/articles/mi_m0984/is_2_125/ai_113852582 (750 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		Mobitz type I (otherwise known as: AV Wenckebach block, intranodal or proximal) is characterized by a progressive PR interval prolongation prior to block of an atrial impulse and a normal QRS complex.
		Mobitz type II (otherwise known as: infranodal or distal) is usually in the His-Purkinje system.
		Unlike Mobitz I and II where they are associated with proximal and distal respectively, there is no fixed association with the 2:1 and location of the disordered conduction system.
	www.muhealth.org /~md2003/draftnotes/arrhythmias.doc (2297 words)

	EKG ECG electrocardiogram puzzler
		Underlying rhythm is 2nd degree Mobitz II block.
		The native rhythm appears to be sinus with high grade heart block (evidence of Mobitz II and CHB) Evidence of appropriate sensing but failure to capture intermittently at the current output settings.
		The native rhythm appears to be second degree A-V Block, Mobitz type II, a conduction abnormality associated with LBBB, thus incomplete trifascicular block.
	sprojects.mmi.mcgill.ca /heart/comments/exmobitzII.html (464 words)

	ELSA (Site not responding. Last check: 2007-11-06)
		Apply and test transcutaneous pacing patches, even in asymptomatic patients; patients with Mobitz II block have a propensity for progression to complete heart block.
		Urgent cardiology consultation is indicated in patients with symptoms and those in whom transcutaneous pacing is tested unsuccessfully; these patients may require placement of a temporary transvenous pacing wire.
		Patients with unstable cardiac signs also may be treated with atropine, although this is much less likely to be successful in Mobitz II block.
	www.emedu.org /elsa2/2nd2.htm (216 words)

	BLOCKS (Site not responding. Last check: 2007-11-06)
		One may try to confuse this rhythm with a blocked PAC but you should note in Mobitz I the p waves are regular in rhythm and the PR interval changes.
		This is a more serious block than Mobitz I. In Mobitz II, every 2nd, 3rd, or 4th impulse is blocked with a corresponding lack of ventricular response.
		Mobitz II is associated with acute anterior or anteroseptal MI.
	www.kauaicc.hawaii.edu /nursing/ekg/tutorial/blocks.htm (1105 words)

	JEMS.com - Journal of Emergency Medical Services (Site not responding. Last check: 2007-11-06)
		Mobitz I second-degree AV block (or Wenckebach) is a regularly irregular grouped rhythm that shows a progression of the PR interval along the rhythm until one of the QRS complexes is dropped (see Figure 3, below).
		Mobitz II second-degree AV block is a regularly irregular grouped rhythm with dropped QRS complexes that shows no variation in the PR interval whatsoever between the dropped beats.
		If evidence exists of Mobitz II second-degree AV block, the situation is a bit more serious and breakdown to a possible complete heart block could occur.
	www.jems.com /jems/31-4/102505 (1429 words)

	Three - EKG
		• Mobitz I block is often a/w R CAD and is usually transient.
		Mobitz I blocks may be seen with disease in the AV node, digitalis toxicity (particularly when it occurs in combination with atrial tachycardia), and parasympathetic (vagal) tone.
		• Distinguished from 2° AV Nodal Block, Mobitz type II by the fact that the PR interval of the P wave that follows the non-conducted P wave is at least 10 msec shorter than the PR interval of the P wave that precedes the non-conducted P wave.
	www.usfca.edu /fac_staff/ritter/threeekg.htm (6109 words)

	Profiles in Cardiology: John Hay: Discoverer of Type II Atrioventricular Block (Site not responding. Last check: 2007-11-06)
		The following phenomena are observed: (1) The first six consecutive atrial systoles (a waves) are followed by c waves and radial arterial pulse waves indicating atrial conduction to the ventricle.
		In 1924, Woldemar Mobitz reported the electrocardiographic correlations of the abnormal jugular wave findings as originally described by Wenckebach and Hay, and classified AV block into two types.
		Mobitz W: Über die unvollständige Störung der Erregungsüberleitung zwischen Vorhof und Kammer des menschlichen Herzens.
	www.clinicalcardiology.org /productcart/pc/briefs/200011briefs/cc23-869.profiles_hay.html (1738 words)

	Is Mobitz type I atrioventricular block benign in adults? -- Shaw et al. 90 (2): 169 -- Heart
		Mobitz type I second degree atrioventricular block (Mobitz I).
		to that of Mobitz II and was improved by pacing.
		Figure 4 Survival to the first outcome (death, deterioration in conduction, or symptomatic bradycardia) in patients with Mobitz I and to death in a matched normal population.
	heart.bmjjournals.com /cgi/content/full/90/2/169 (3213 words)

	Cecil Textbook of Medicine : />
		In type I, also called Mobitz type I or Wenckebach phenomenon, there is a progressive increase in the PR interval, despite a constant PP rate, until a P wave blocks and the cycle is repeated (Fig.
		Type II AV, or Mobitz type II, block causes a sudden, unexpected block of a P wave without a discernible change in the PR interval before the AV block (see Fig.
		A 2:1, 3 :1, or higher AV ratio of AV block may be noted with progression of Mobitz I or II to third-degree AV block.
	www.merckmedicus.com /ppdocs/us/common/cecils/chapters/059_012.htm (1297 words)

	AtrioVentricular Conduction Disturbances
		In second-degree AV block (called Mobitz type II) a stable P-P interval is present with no prolongation of the PR interval before an abrupt conduction failure (see EKG illustration, third from top).
		In AV block with 2:1 conduction ratio or higher (like 3:1 or 4:1) prolongation of the PR interval before the block is impossible to observe (so type I or II is not appropriate).
		In 2:1 block, a narrow QRS complex (normal time of inscription) and associated periods of Wenchebach block, or simultaneous sinus slowing (vagus block), suggest that AV nodal block is present.
	www.rjmatthewsmd.com /Definitions/AtrioVent_cond_dist.htm (670 words)

	[No title]
		In Mobitz Type I, the PR interval gradually increases until a QRS is dropped.
		In Mobitz II, the PR interval is constant, but the QRS complex is still dropped.
		Here, the P-waves in Leads II, I, or L are prolonged to 120 msec or 0.12 sec or three small boxes.
	www.psot.com /ECGBook2.doc (2294 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		Surface ECG leads I, II, and V1 are displayed with intracardiac ECGs from the high right atrium (HRA), left atrium from the coronary sinus (CS), and AV junction to obtain a His bundle electrogram (HBE).
		Mobitz type II is usually due to disease of the His-Purkinje system and is characterized by a wide QRS.
		It is important to recognize Mobitz type II because it has a high incidence of progression to complete heart block with an unstable, slow, more distal escape pacemaker taking over impulse generation.
	www.muhealth.org /~md2003/updatenotes/10-20arrythmia.doc (2842 words)

	Mobitz' block type I and II (www.whonamedit.com)
		Type I is characterized by a progressive lengthening of the P-R intervals — identical to Wenckebach period/phenomenon.
		The very rare Mobitz type II is characterized by intermittent failure to conduct a P wave through the atrioventricular node to the ventricle, with constant PR interval.
		The form of second degree atrioventricular block now known as Mobitz type II AV block was first discovered by the English physician John Hay (born 1873) in 1905 and by Karel Frederik Wenckebach (1864-1940) in 1906, independently.
	www.whonamedit.com /synd.cfm/2824.html (227 words)

	23 May 2005 (Site not responding. Last check: 2007-11-06)
		In 1924, Woldemar Mobitz, an early 20th century German internist, analyzed arrhythmias by graphing the relationship of changing atrial rates and premature beats to AV conduction.
		Through an astute mathematical approach, he was able to classify second-degree atrioventricular block into 2 types, subsequently referred to as Mobitz type I (Wenckebach) and Mobitz type II (Hay).
		Type II AV block frequently progressed to complete AV block and was associated with seizures, death, and pathological findings.
	www.targethealth.com /ontarget/2005/05232005.htm (1807 words)

	Lidocaine-induced second-degree mobitz type II heart block -- Hilleman et al. 19 (9): 669 -- The Annals of ...
		One case of Mobitz type II heart block has been reported in a patient with a prolonged QTc interval (0.61 sec) who was also receiving prenylamine.
		We report a case of Mobitz type II heart block following therapeutic doses of lidocaine in the absence of acute myocardial infarction or concomitant cardioactive drug administration.
		This case, in conjunction with other reported data, suggests the occurrence of lidocaine-induced AV block to be unpredictable.
	www.theannals.com /cgi/content/abstract/19/9/669 (222 words)

	London Ambulance Unofficial. ECG. EKG.
		Second degree AV block is also known as Second Degree Type I, Mobitz I, or Wenckelbach.
		Mobitz II is characterized by 2-4 P waves before each QRS.
		Ventricular rate will depend on the number of impulses conducted through the AV node, and will be less than the atrial rate.
	home.freeuk.net /lond.ambulance/ecg/ECG2.htm (1078 words)

	EKG Review 2: SSS & Heart Blocks. A LearnWell course
		The drug used to treat symptomatic Mobitz 1 is atropine.
		Mobitz II has the potential of progressing into a third degree heart block or ventricular standstill.
		A transcutaneous or permanent pacemaker may be a solution for Mobitz II.
	www.learnwell.org /ekg200.htm (1241 words)

Try your search on: Qwika (all wikis)