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Premature Junctional Contraction

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1. Premature Junctional Contraction

Premature Junctional Contraction Premature Junctional Contraction Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Premature Junctional (...) Contraction Premature Junctional Contraction Aka: Premature Junctional Contraction , PJC From Related Chapters II. Causes Same as for s III. Signs: EKG Findings Inverted (retrograde) if present Narrow complex if high nodal source Wide complex if lower nodal source Images: Related links to external sites (from Bing) These images are a random sampling from a Bing search on the term "Premature Junctional Contraction." Click on the image (or right click) to open the source website in a new browser window

2018 FP Notebook

2. Electrocardiographic characteristics of idiopathic premature ventricular contractions originating from the junction of the right ventricular outflow tract and tricuspid annulus. (Abstract)

Electrocardiographic characteristics of idiopathic premature ventricular contractions originating from the junction of the right ventricular outflow tract and tricuspid annulus. The right ventricular outflow tract (RVOT) and tricuspid annulus (TA) are common origins for idiopathic PVCs from the right ventricle. We sought to clarify the characteristics of a subgroup of idiopathic PVCs originating from the RVOT-TA junction.Surface ECG and intra-cardiac electrophysiological characteristics were (...) analyzed in 101 patients with frequent PVCs who underwent successful RFCA in the right ventricle. Pacing was performed in the right ventricle in another 5 control subjects. The origin of PVCs determined by the successful ablation site was at the RVOT, the TA and the RVOT-TA junction in 78, 11 and 12 patients, respectively. The PVCs originating from RVOT-TA junction showed a monophasic R wave in leads I, II, III and aVF and a flat QRS complex in lead aVL. A flat QRS complex (rsr', qs, qr, rs or r

2015 International journal of cardiology

3. A confused ECG with multiple rhythms caused by atrial premature contractions: A case report. Full Text available with Trip Pro

A confused ECG with multiple rhythms caused by atrial premature contractions: A case report. Atrial premature contractions (APCs) are commonly encountered in clinical practice. The APCs may influence heart conduction system and induce other arrhythmia. The disorder of atrioventricular conduction is related to electrophysiological phenomena, difficult to understand and diagnose.We presented a 15-year-old male patient whose baseline electrocardiogram (ECG) was confused with multiple rhythms (...) . Electrophysiological study results showed sinus rhythm with nonconducted APCs in bigeminal rhythm. Nonconducted APCs were blocked without H wave. Some APCs conducted to ventricle with longer AH interval and HV interval. When APCs were abolished by radiofrequency ablation, this patient was free from any arrhythmia during follow-up.We considered that the basic rhythm of the baseline ECG was sinus rhythm with atrial bigeminy rhythm and narrow QRS extrasystoles (junctional); some APCs were blocked and some APCs

2017 Medicine

4. Radiofrequency ablation of ventricular premature contraction originating from a native coronary cusp after transcatheter aortic valve replacement Full Text available with Trip Pro

Radiofrequency ablation of ventricular premature contraction originating from a native coronary cusp after transcatheter aortic valve replacement We describe a case of radiofrequency ablation of ventricular premature contraction (VPC) originating from the left ventricular outflow tract after transcatheter aortic valve replacement. The VPC origin was the native aortic valve annulus between the left and right coronary cusps. Radiofrequency ablation was successfully performed by manipulating (...) the ablation catheter from the gap between the sinotubular junction and implanted valve.

2017 Journal of arrhythmia

5. Premature Junctional Contraction

Premature Junctional Contraction Premature Junctional Contraction Toggle navigation Brain Head & Neck Chest Endocrine Abdomen Musculoskeletal Skin Infectious Disease Hematology & Oncology Cohorts Diagnostics Emergency Findings Procedures Prevention & Management Pharmacy Resuscitation Trauma Emergency Procedures Ultrasound Cardiovascular Emergencies Lung Emergencies Infectious Disease Pediatrics Neurologic Emergencies Skin Exposure Miscellaneous Abuse Cancer Administration 4 Premature Junctional (...) Contraction Premature Junctional Contraction Aka: Premature Junctional Contraction , PJC From Related Chapters II. Causes Same as for s III. Signs: EKG Findings Inverted (retrograde) if present Narrow complex if high nodal source Wide complex if lower nodal source Images: Related links to external sites (from Bing) These images are a random sampling from a Bing search on the term "Premature Junctional Contraction." Click on the image (or right click) to open the source website in a new browser window

2015 FP Notebook

6. New electrocardiographic criteria for predicting successful ablation of premature ventricular contractions from the right coronary cusp. (Abstract)

New electrocardiographic criteria for predicting successful ablation of premature ventricular contractions from the right coronary cusp. ECG features for predicting successful ablation sites of outflow tract (OT) premature ventricular complex (PVCs) have been previously presented, but effective predictors of right coronary cusp (RCC) remain elusive.106 patients (59 males, 56±14years) who underwent successful PVC ablation were studied. Various ECG patterns and measurements were analyzed (...) to identify the unique features of RCC PVC origins. The R-wave duration index (RWDI) was calculated as a percentage by dividing the QRS complex duration by the longest R-wave duration in lead V1 or V2.Successful ablation sites were the RCC in 18 patients, the left coronary cusp (LCC) in 20, the RCC/LCC junction (RLJ) in 22, the AIV/GCV in 11 and the right ventricular outflow tract in 35. Forty-seven patients had dominantly positive forces in lead I. Among these 47 patients, 19 were ablated from the RCC

2016 International journal of cardiology

7. Management of bleeding in the late preterm period

of individuals with placenta previa and accreta. Obstet Gynecol . 2010 ; 116 : 835–842 | | | Risk factors for unscheduled preterm delivery in this population include vaginal bleeding and the presence of uterine contractions, with each episode of bleeding increasing the likelihood of unscheduled delivery. x 26 Bowman, Z.S., Manuck, T.A., Eller, A.G., Simons, M., and Silver, R.M. Risk factors for unscheduled delivery in patients with placenta accreta. Am J Obstet Gynecol . 2014 ; 210 : 241.e241–241.e246 (...) . These include hypertension, smoking, preterm premature rupture of the membranes, cocaine abuse, uterine myomas, and previous abruption. x 33 Ananth, C.V., Savitz, D.A., and Williams, M.A. Placental abruption and its association with hypertension and prolonged rupture of membranes: A methodologic review and meta-analysis. Obstet Gynecol . 1996 ; 88 : 309–318 | The incidence of placental abruption is estimated to be between 0.5% and 1%. x 34 Ananth, C.V., Oyelese, Y., Yeo, L., Pradhan, A., and Vintzileos, A.M

2017 Society for Maternal-Fetal Medicine

8. Evaluation of Symptomatic Esophagogastric Junction Outflow Obstruction. (Abstract)

with regurgitation (0% vs 41.2%, P = 0.05). Anatomical EGJOO had higher frequencies of premature contraction (50% vs 5.9%, P = 0.003) and lower mean values of distal latency (5.6 +/- 1.3 vs 6.7 +/- 1.2, P = 0.004). Computed tomography scans revealed 50% (3/6) of etiologies of anatomical EGJOO. Approximately, 73.5% (25/34) of patients with functional EGJOO had spontaneous resolution of their symptoms. One underwent pneumatic dilatation with symptom resolution while remaining eight with persistent symptoms were (...) Evaluation of Symptomatic Esophagogastric Junction Outflow Obstruction. Esophagogastric junction outflow obstruction (EGJOO) may be due to anatomical abnormalities, but it is unclear how to evaluate them after high-resolution manometry. We aimed to determine (i) clinical and high-resolution manometry parameters differentiating anatomical EGJOO from functional EGJOO, (ii) investigations chosen and yield for anatomical EGJOO, and (iii) clinical outcomes of functional EGJOO.Medical records

2018 Journal of gastroenterology and hepatology

9. Premature Junctional Beats Mimic 2nd Degree Block Mobitz Type II (contributed by K. Wang)

. The stress test was stopped for fear that it was induced by ischemia. This tracing was also recorded during the stress test: Figure 2. In this tracing, there are many premature junctional contractions ( PJC , premature narrow complex beats without any preceding P -wave). Note that they do not reset the sinus node, which marches out at the same rhythm on succeeding beats. Thus, these premature beats occur close to the sinus P-wave and are dissociated, as diagrammed here: Figure 3. The arrows point out (...) Premature Junctional Beats Mimic 2nd Degree Block Mobitz Type II (contributed by K. Wang) Dr. Smith's ECG Blog: Pseudo Type II Second Degree AV Block Induced by Concealed Premature Junctional Complexes (PJCs) (contributed by K. Wang) Monday, August 26, 2013 This patient is running on a treadmill: Figure 1. There are frequent apparently non-conducted p-waves. The PR interval is not lengthening, so this is not AV Wenckebach phenomenon. It appears to be 2nd degree AV block, Mobitz Type II

2013 Dr Smith's ECG Blog

10. Ablation of Nkx2-5 at mid-embryonic stage results in premature lethality and cardiac malformation. Full Text available with Trip Pro

Ablation of Nkx2-5 at mid-embryonic stage results in premature lethality and cardiac malformation. Human congenital heart disease linked to mutations in the homeobox transcription factor, NKX2-5, is characterized by cardiac anomalies, including atrial and ventricular septal defects as well as conduction and occasional defects in contractility. In the mouse, homozygous germline deletion of Nkx2-5 gene results in death around E10.5. It is, however, not established whether Nkx2-5 is necessary (...) results in embryonic death by E17.5. Analysis of mutant embryos at E16.5 shows arrhythmias, contraction defects, and cardiac malformations, including ASD. Quantitative measurements using serial section histology and three-dimensional reconstruction demonstrate growth retardation of the septum secundum and enlarged foramen ovale in Nkx2-5-ablated embryos. Functional cardiac defects may be attributed to abnormal expression of transcripts critical for conduction and contraction, including cardiac voltage

2011 Cardiovascular Research

11. Guidelines on Supraventricular Tachycardia (for the management of patients with) Full Text available with Trip Pro

isthmus-dependent macro-re-entrant atrial tachycardia 27 11.1.4.2.1 Right atrium macro-re-entrant atrial tachycardia 27 11.1.4.2.2 Left atrium macro-re-entrant atrial tachycardia 28 11.2 Atrioventricular junctional arrhythmias 29 11.2.1 Atrioventricular nodal re-entrant tachycardia 29 11.2.1.1 Diagnosis 29 11.2.1.1.1 12 lead electrocardiogram during tachycardia 29 11.2.1.1.2 Electrophysiology study 30 11.2.1.1.3 Typical atrioventricular nodal re-entrant tachycardia 30 11.2.1.1.4 Atypical (...) atrioventricular nodal re-entrant tachycardia 30 11.2.1.2 Therapy 30 11.2.1.2.1 Acute therapy 31 11.2.1.2.2 Catheter ablation 31 11.2.1.2.3 Chronic therapy 31 11.2.2 Non-re-entrant junctional tachycardias 32 11.3 Atrioventricular arrhythmias 32 11.3.1 Accessory pathways 32 11.3.2 Wolff Parkinson White syndrome 33 11.3.3 Orthodromic atrioventricular re-entrant tachycardia 33 11.3.4 Antidromic atrioventricular re-entrant tachycardia 34 11.3.5 Accessory pathway as a bystander 34 11.3.6 Pre-excited atrial

2019 European Society of Cardiology

12. Management of Poisoning

It is premature to recommend the administration of activated charcoal in the home (pg 74). Grade C, Level 2- GPP The ? rst action for a caregiver of a child who may have ingested a toxic substance is to consult with a doctor (pg 74). GPP Enhancing the elimination of toxic substances from the body Multiple-dose activated charcoal (MDAC) D Based on experimental and clinical studies, multiple-dose activated charcoal should be considered only if a patient has ingested a life-threatening amount of carbamazepine

2020 Ministry of Health, Singapore

15. Safe Cholecystectomy Multi-Society Practice Guideline and State of the Art Consensus Conference on Prevention of Bile Duct Injury during Cholecystectomy

artery divided. 63 A prospective trial evaluated patients with contracted gallbladders as determined by preoperative sonographic criteria. 64 Patients were randomized by alternate numbers to either conventional laparoscopic cholecystectomy or to laparoscopic fundus-first dissection. Ten patients were excluded and two additional patients were added based on intraoperative finding of a contracted gallbladder. Among the 31 patients undergoing standard laparoscopic cholecystectomy, there were 10 (...) that in cases of laparoscopic cholecystectomy where the severity of the local inflammation prevents safe identification of biliary anatomy and acquisition of the critical view of safety, an alternative approach should be used that minimizes the risk of BDI. Both subtotal and top-down cholecystectomy approaches have been reported to be useful under such difficult conditions. However, one study has implicated the top-down approach under challenging operative conditions with contracted GB and chronic

2020 Society of American Gastrointestinal and Endoscopic Surgeons

16. EHRA/HRS/APHRS/LAHRS Expert Consensus on Risk Assessment in Cardiac Arrhythmias: Use the Right Tool for the Right Outcome

implantable cardioverter-de?brillator ther- apies 30 Appropriate shock predictors 30 Inappropriate shock predictors 31 Risk for heart failure incidence and progression 31 Risk for death in ventricular tachyarrhythmia patients 32 Nielsen et al Risk Assessment in Cardiac Arrhythmias 3Risk of adverse outcomes in patients treated with catheter ablation 32 How to assess risk for adverse outcome in patients with other speci?c cardiac conditions 34 Patients with ventricular premature contractions 34 Premature (...) ventricular complex frequency 34 Premature ventricular complex morphology 34 Prematureventricularcomplexcoupling interval 34 Patients with supraventricular tachyarrhythmiasuch as Wolff–Parkinson– White syndrome and focal atrial tachycardia 35 Summary 35 Supplementary Data 36 Introduction Patientswithcardiacdiseasesorconditionswithhighriskof developing cardiacdiseases undergo risk assessment bycar- diologists, primary care physicians, and scientists based on referralformoreadvancedriskassessmentstrategies

2020 Heart Rhythm Society

18. Care around stillbirth and neonatal death

, giving a PMR of 11.2 per 1000 (8.1 and 3.1/1000 for fetal and neonatal death rates respectively) 5 . For Indigenous and other disadvantaged women in both settings (similar to other high income settings), the risk of perinatal death is around double 5,6,9,17 . Using the PSANZ classification system the leading causes of stillbirth are congenital anomaly and spontaneous preterm. However in approximately 20-30% of stillbirths, a cause is never identified. Similarly, for neonatal mortality, the main cause (...) of death using the PSANZ PDC is congenital anomaly and spontaneous preterm 16 . Contributing factors relating to care (also called sub-optimal, avoidable or suspected preventable factors) have been reported in approximately 30-50% of perinatal deaths 5,18-20 . Recent reports have reinforced that prevention is possible and that there is clear potential to reduce these deaths through improved quality of care driven by high quality perinatal mortality audit (e.g. the Bacchus Marsh enquiry into cases

2019 Centre of Research Excellence in Stillbirth

19. Oesophageal manometry and oesophageal reflux monitoring

been recognised that the previous defini- tion of simultaneous waves (contractile front velocity of distal peristaltic wave >8 cm/s) presenting in >20% of water swal- lows with amplitude >30 mm Hg, 83 is not specific for DOS. 10 84 Premature contractions, defined as a distal latency 180 mm Hg. 41 Originally, HRM DCI >5000 mm Hg. s. cm was taken to indicate hypertensive peristalsis, with a subgroup with DCI >8000 mm Hg. s. cm and repetitive contractions termed ‘spastic nutcracker’, invariably (...) Integrated relaxation pressure The integrated relaxation pressure (IRP) is calculated as the lowest mean deglutitive oesophago-gastric junction (OGJ) pressure referenced to gastric pressure for 4 continuous or non-contin- uous seconds during a 10 s window after the onset of swallowing, measured from the start of upper oesophageal sphincter (UOS) opening. This provides information on the degree of OGJ relax- ation during swallowing. 11 12 Distal contractile integer The distal contractile integer (DCI

2019 British Society of Gastroenterology

20. Management of Heart Failure (4th Edition)

. For Malaysia, the estimated overall HF costs was $USD 194 million (MYR 785 million), of which the direct and indirect costs were $USD 12 million (MYR 48.7 million) and $USD 182 million (MYR 740 million). 12 This is approximately 1.8% of total health expenditure, with 3.6% GDP spent on health. In general, in most low and medium economies like Malaysia, the indirect costs of HF in terms of premature mortality, morbidity, lost earning potential and unpaid care costs outweigh the direct costs. HF poses a major (...) contraction ? Vasoconstriction of arterial resistance vessels to maintain blood pressure ? Venous constriction to increase venous preload ? Salt and water retention to increase preload In general, these neurohormonal responses are compensatory mechanisms. However they can also aggravate HF by increasing ventricular afterload and increasing preload to the point where pulmonary and/or systemic congestion and oedema occur. In the setting of LV myocardial dysfunction, LVEF may be: ? Reduced (LVEF = 40

2019 Ministry of Health, Malaysia

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