Pseudo‐elevation of conduction system pacing threshold through parallel connection of an intracardiac electrogram recording system

2021 ◽  
Author(s):  
Jun Yokota ◽  
Katsuhito Fujiu ◽  
Tsukasa Ohshima ◽  
Takumi J Matsubara ◽  
Jun Matsuda ◽  
...  
Keyword(s):  
Conduction System ◽  
Recording System ◽  
Parallel Connection ◽  
Pacing Threshold ◽  
Intracardiac Electrogram

scholarly journals Pros and Cons of Left Bundle Branch Pacing

2020 ◽  
Vol 13 (12) ◽  
Author(s):  
Venkatesh Ravi ◽  
Jillian L. Hanifin ◽  
Timothy Larsen ◽  
Henry D. Huang ◽  
Richard G. Trohman ◽  
...  
Keyword(s):  
Cardiac Resynchronization Therapy ◽  
Success Rate ◽  
Left Ventricular ◽  
Conduction System ◽  
Cardiac Resynchronization ◽  
Resynchronization Therapy ◽  
Real World Data ◽  
Pacing Threshold ◽  
Promising Alternative

Background: Left bundle branch pacing (LBBP) has recently emerged as a promising alternative modality for conduction system pacing. However, limited real-world data exists on the advantages and complications associated with LBBP. We analyzed the Rush conduction system pacing registry on LBBP to assess the success rates and complications associated with LBBP. Methods: All patients with an indication for permanent pacemaker or cardiac resynchronization therapy that underwent LBBP for various reasons from June 2018 to April 2020 were included in the analysis. Results: A total of 57 of 59 patients underwent successful LBBP (success rate 97%). The average follow-up duration was 6.2±5 months. The implanted devices included 38 dual-chamber pacemakers, 17 cardiac resynchronization therapy defibrillators, and 2 cardiac resynchronization therapy pacing systems. The most common reason for performing LBBP was a high His-Bundle pacing threshold (n=23) at implant. The mean LBBP capture threshold at implant was 0.62±0.21 V at 0.4 ms which remained stable during follow-up at 0.65±0.68 V at 0.4ms. In 21 patients with cardiomyopathy, there was a significant improvement in left ventricle ejection fraction from 30±11% to 42±15%. A total of 7 lead-related complications (12.3%) were noted in the follow-up period. Three patients (5.3%) required lead revision during the follow-up period. Interventricular septal perforation occurred (as late sequela) after 2 weeks in one patient. Conclusions: LBBP can be achieved with a high success rate and low capture thresholds. Left ventricular dysfunction improved significantly during follow-up. Lead-related complications were relatively common occurring in 12.3% of initially successful implants. Lead revision was required in 3 (5%) of patients.

Neural Network for Automatic Analysis of Motility Data

1994 ◽  
Vol 33 (01) ◽  
pp. 157-160 ◽  
Author(s):  
S. Kruse-Andersen ◽  
J. Kolberg ◽  
E. Jakobsen
Keyword(s):  
Neural Network ◽  
Muscular Activity ◽  
Recording System ◽  
Automatic Analysis ◽  
Biologically Relevant ◽  
System A ◽  
The Neural Network ◽  
Valuable Method ◽  
Motor Abnormalities ◽  
Trained Network

Abstract:Continuous recording of intraluminal pressures for extended periods of time is currently regarded as a valuable method for detection of esophageal motor abnormalities. A subsequent automatic analysis of the resulting motility data relies on strict mathematical criteria for recognition of pressure events. Due to great variation in events, this method often fails to detect biologically relevant pressure variations. We have tried to develop a new concept for recognition of pressure events based on a neural network. Pressures were recorded for over 23 hours in 29 normal volunteers by means of a portable data recording system. A number of pressure events and non-events were selected from 9 recordings and used for training the network. The performance of the trained network was then verified on recordings from the remaining 20 volunteers. The accuracy and sensitivity of the two systems were comparable. However, the neural network recognized pressure peaks clearly generated by muscular activity that had escaped detection by the conventional program. In conclusion, we believe that neu-rocomputing has potential advantages for automatic analysis of gastrointestinal motility data.

The Development of an Automatic Chronic Otitis Media Operation Recording System with Concurrent Data Input Process

2012 ◽  
Vol 55 (1) ◽  
pp. 14
Author(s):  
Sung Wan Byun ◽  
Soo Yeon Jung ◽  
Ilhoe Jung ◽  
Jin Young Park
Keyword(s):  
Otitis Media ◽  
Chronic Otitis Media ◽  
Recording System ◽  
Data Input ◽  
Input Process

EFFECT OF LOCALLY IMPLANTED OESTROGEN ON THE RESPONSE OF THE RAT'S LACTATING MAMMARY GLAND TO OXYTOCIN

1973 ◽  
Vol 73 (4) ◽  
pp. 700-712 ◽  
Author(s):  
J. D. Bruce ◽  
X. Cofre ◽  
V. D. Ramirez
Keyword(s):  
Mammary Gland ◽  
Mammary Glands ◽  
Myoepithelial Cells ◽  
Recording System ◽  
Saline Infusion ◽  
High Dose ◽  
Low Doses ◽  
Milk Ejection ◽  
Lactating Mammary Gland ◽  
Small Rise

ABSTRACT On the day following delivery (day 1 of lactation) one abdominal mammary gland was implanted with oestrogen and the contralateral gland received an empty needle. At 2, 5 or 10 days of lactation the rats were anaesthetized with pentobarbital and the nipples of both abdominal glands were cannulated and their pressures recorded by means of transducers coupled to an amplifier and recording system. The normal mammary glands of 5-day lactating rats responded to very low doses of oxytocin (Syntocinon®, Sandoz) (5× 10−8 mU) with a rhythmic elevation in pressure. However, saline infusion also evoked a small rise in intra-mammary pressure. Earlier (2 days) and later (10 days) in lactation the responses were smaller. Oestrogen decreases significantly the milk ejection response to oxytocin, and the effect was maximal at day 10 of lactation. Histological observations confirmed the diminished reaction of the gland to oxytocin, since the milk was retained in the alveoli of rats bearing a mammary-oestrogen implant. A paradoxical rise in pressure was detected in normal as well as in oestrogen-implanted glands when the lowest dose of oxytocin was injected in lactating rats which had previously received a high dose of oxytocin (50 mU or 500 mU). These results reinforce the hypothesis that oestrogen alters the milk ejection response to oxytocin and that the mechanism is probably related to changes in the contractility of the myoepithelial cells.

A Study for the Korean Accounting Curriculum Development of Merchandising Inventory Recording System

2018 ◽  
Vol 27 (2) ◽  
pp. 185-230
Author(s):  
Yeongchan Choi ◽  
Chunwoo Shin ◽  
Seungje Jo ◽  
Yugeun Jo
Keyword(s):  
Curriculum Development ◽  
Recording System ◽  
Accounting Curriculum

Opseis (TM) seismic recording system

2018 ◽  
Author(s):  
H.A. Tims
Keyword(s):  
Recording System ◽  
Seismic Recording
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