+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Electrophysiologic testing in bundle branch block and unexplained syncope

, : Electrophysiologic testing in bundle branch block and unexplained syncope. American Journal of Cardiology 54(6): 587-591

Patients (32) with bundle branch block and unexplained syncope underwent electrophysiologic testing, including programmed ventricular stimulation with up to triple extrastimuli. The infranodal conduction time (HV) was 70 ms or greater in 12 patients. Pathologic infranodal block during atrial pacing occurred in 2 patients. Unimorphic ventricular tachycardia (VT) was induced in 9 patients (28%) and polymorphic VT in 5 (16%). A permanent pacemaker was implanted in patients with infranodal block during atrial pacing and, generally, in patients with an HV of 70 ms or more. Patients with inducible unimorphic or sustained polymorphic VT were treated with an antiarrhythmic drug. The mean follow-up period was 19 .+-. 14 mo. (.+-. SD). Three patients died suddenly: a noncompliant patient with inducible sustained VT; a patient with a normal electrophysiologic study treated empirically with quinidine for premature ventricular complexes; and a patient with an HV of 70 ms and no inducible VT treated with a permanent pacemaker. The actuarial incidence of sudden death was 10% at 45 mo. of follow-up. Only 2 patients had recurrent syncope; both had a normal electrophysiologic study. Approximately 50% of patients with bundle branch block and unexplained syncope who undergo electrophysiologic testing are found to have a clinically significant abnormality (HV of 70 ms or more, infranodal block during atrial pacing and inducible unimorphic VT), and some patients have > 1 abnormality. Long-term management guided by the results of electrophysiologic testing generally is successful in preventing recurrent syncope. Patients who have a normal electrophysiologic study or who have inducible nonsustained polymorphic VT usually have a benign prognosis when left untreated.

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 005349365

PMID: 6475778

DOI: 10.1016/0002-9149(84)90254-6

Download PDF Full Text: Electrophysiologic testing in bundle branch block and unexplained syncope

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Sun, H-Xiang.; Xu, Y.; Yang, X-Rong.; Wang, W-Min.; Bai, H.; Shi, R-Yu.; Nayar, S.K.; Devbhandari, R.P.; He, Y-zhou.; Zhu, Q-Feng.; Sun, Y-Fan.; Hu, B.; Khan, M.; Anders, R.A.; Fan, J., 2013: Hypoxia inducible factor 2 alpha inhibits hepatocellular carcinoma growth through the transcription factor dimerization partner 3/ E2F transcription factor 1-dependent apoptotic pathway. Hypoxia inducible factors (HIFs) are activated in many tumors and show either promoter or suppressor activity, depending on tumor cell biology and background. However, the role of HIF member HIF-2α remains unclear in hepatocellular carcinoma (HCC...

Anonymous, 1995: California: marijuana compassionate use statewide initiative. An initiative to legalize medical access to and use of marijuana was submitted to the California Attorney General. Supporters must collect 430,000 valid signatures to include the initiative on California's 1996 ballot. The initiative allows p...

Hollert, H.; Heise, S.; Keiterl, S.; Heininger, P.; Forstner, U., 2007: Wasserahmenrichtlinie - WRRL - Wasserahmenrichtlinie - Fortschritte und Defizite. Background. The water protection policy of the European Union sits on new footings since the end of 2000: The Water Framework Directive (WFD). By replacing, merging and renewing all parts of the European water protection policy from the 1970s, th...

Gerber G.K.G.; Schultze M.; Rapoport S.M., 1970: Occurrence and function of a high michaelis constant hexo kinase in immature red blood cells. European Journal of Biochemistry 17(3): 445-449

Gulbis, B.; Alexandre, K.; Delhaye, M.; Galand, P., 1993: Normal and abnormal p21 h-ras posttranslational products in human neoplastic and nonneoplastic liver-tissues. Using two-dimensional Western blot analysis with a pan-ras antibody, we previously defined conditions that allow to resolve the four post-translational p21-H-ras products expressed in normal mature rat tissues. Using the same approach, we conducte...

Stevens, J.W.; Oike, Y.; Handley, C.; Hascall, V.C.; Hampton, A.; Caterson, B., 1984: Characteristics of the core protein of the aggregating proteoglycan from the Swarm rat chondrosarcoma. A ternary complex of hyaluronic acid-binding region and link protein bound to hyaluronic acid was isolated from limit clostripain digests of proteoglycan aggregates isolated from the Swarm rat chondrosarcoma. Under these conditions, the hyaluronic...

Hill, M.A.; Meininger, G.A., 2012: Arteriolar vascular smooth muscle cells: mechanotransducers in a complex environment. Contraction of small artery (diameters typically less than 25<hsp sp=".25"/>?m) vascular smooth muscle cells (VSMCs) plays a critical role in local control of blood flow and arterial pressure through its affect on vascular caliber....

Mein Pierre, 1966: Rotundomys, nouveau genre de Cricetidae Mammalia, Rodentia de la faune neogene de Montredon Herault. On the basis of molars found in white marls between the villages of Bize, Argeliers, and Montouliers, a new Miocene rodent genus, Rotundomys, is erected. Cricetodon montisrotundi Schaub (1944) is rediagnosed and designated as the type species.

Snyder, E.L.; Baril, L.; Cooper, D.L.; Min, K.; Mechanic, S.; Stoddart, L.; Burtness, B.; Seagraves, P.; Debelak, J.; Gudino, M.; Mccullough, J., 2000: In vitro collection and posttransfusion engraftment characteristics of MNCs obtained by using a new separator for autologous PBPC transplantation. BACKGROUND: A clinical study was performed to evaluate the peripheral blood progenitor cell (PBPC) collection, transfusion, and engraftment characteristics associated with use of a blood cells separator (Amicus, Baxter Healthcare). STUDY DESIGN AN...

Malik, R.D.S.; Kavimandan, S.K.; Tilak, K.V.B.R., 1999: Kurthia sp.-a novel ecofriendly inoculant for rapeseed (Brassica campestris var toria). Kurthia sp., a Gram positive, ammonifying, urea hydrolysing, thermotolerant organism, was isolated from the rhizosphere of wheat. Seed inoculation of B. campestris var. toria cv. Toria-9 with Kurthia sp. increased growth and yield.