• The Korean Nurse
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• v.25 no.4 s.137
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• pp.22-26
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• 1986

• Proceedings of the KOSOMBE Conference
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• v.1998 no.11
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• pp.119-120
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• 1998

In this study, the design of the single-chamber pacemaker tester is presented. It is important to test the functions of the pacemaker before it is implanted into the patient. A pacemaker tester, that is presented in this study, is able to examine pacemaker parameters such as sensing threshold and refractory period. We need to make artificial intracardiac electrogram in order to test the pacemaker parameters. We know from the previous practical examples that a triangle pulse is similar to the physiologic intracardiac electrogram. The tester generates the simplified electrograms and PC software examines the output pulses of the pacemaker which is VVIR mode in closed-loop simulation.

• Journal of Biomedical Engineering Research
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• v.36 no.5
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• pp.198-203
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• 2015

The purpose of the study is to examine the effects of pacemaker location on cardiac pumping efficacy theoretically. We used a three-dimensional finite element cardiac electromechanical model of canine ventricles with models of the circulatory system. Electrical activation time for normal sinus rhythm and artificial pacing in apex, left ventricular free wall, and right ventricular free wall were obtained from electrophysiological model. We applied the electrical activation time maps to the mechanical contraction model and obtained cardiac mechanical responses such as myocardial contractile ATP consumption, stroke work, stroke volume, ejection fraction, and etc. Among three artificial pacing methods, left ventricle pacing showed best performance in ventricular pumping efficacy.

• Journal of Chest Surgery
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• v.53 no.2
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• pp.82-85
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• 2020

Insertion of an epicardial pacemaker is a useful treatment for pediatric patients with an abnormal heart rhythm. However, there are limitations and concerns when implanting epicardial pacemakers in infants and neonates due to their small body size. We report a patient who experienced rare complications after implantation of a permanent pacemaker.

• Journal of electromagnetic engineering and science
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• v.10 no.4
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• pp.206-211
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• 2010

In this paper, an implantable planar inverted-F antenna (PIFA) for an artificial cardiac pacemaker is proposed. The antenna has a simple structure with a low profile and is placed on the top side of the pacemaker. The dimensions of the pacemaker system, including the antenna element, are $42{\times}43.6{\times}11$ mm. When the antenna is embedded in pig tissue, its $S_{11}$ value is -10.94 dB at 403 MHz and the -10 dB impedance bandwidth of the antenna is 6 MHz (399~406 MHz). The proposed PIFA in tissue has a peak gain of -20.19 dBi and a radiation efficiency of 1.12 % at 403 MHz. When the proposed antenna is placed in a flat phantom, its specific absorption ratio (SAR) value is 0.038 W/kg (1 g tissue). Performances of the proposed PIFA is sufficient to operate at the MICS band (402 ~ 405 MHz).

• Journal of Yeungnam Medical Science
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• v.31 no.2
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• pp.113-116
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• 2014

A 52-year-old man was referred to our hospital due to fever and myalgia that occurred 2 weeks earlier. He showed a complete atrioventricular block on his electrocardiogram, and his vital signs were unstable. On his transthoracic echocardiograph, the 1.5 cm vegetation in the aortic valve with severe aortic regurgitation suggested infective endocarditis. His transesophageal enchocardiograph showed abscess in his mitral-aortic intervalvular fibrosa and vegetation was suspected on his anterior mitral valve leaflet. The patient underwent an emergent operation for valve replacement with temporary epicardial pacing. Intraoperatively, the septal leaflet of his tricuspid valve was injured during the debridement of the abscess pocket that was extended to the membranous septum. The aortic, mitral, and tricuspid mechanical valves were replaced with annular reconstruction without complications. After 14 days of intravenous antibiotics, we successfully changed the epicardial pacemaker into a transvenous DDD-type permanent pacemaker by placing a left ventricular lead via the coronary sinus and an atrial lead in the right atrium appendage. The patient was discharged in a tolerable state and was examined uneventfully in our hospital's outpatient clinic for 8 months.

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.55-58
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• 2003

Segmented polyurethanes have been widely used for various commercial and experimental blood-contacting and tissue-contacting applications such as vascular prostheses, blood pumps, heart valves, pacemaker lead wire insulation, catheters, artificial hearts, and cardiac assist devices due to their generally favorable physical and mechanical properties, as well as fairly good biocompatibility and antithrombogenicity characteristics. (omitted)

• Journal of Chest Surgery
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• v.31 no.4
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• pp.398-401
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• 1998

A 56-year-old female with a permanent unipolar pacing(VVI) system underwent elective coronary bypass surgery and mitral valve replacement. Because the unipolar sensing is subject to considerable nonmyocardial electrical noise, the pacing function may be disturbed by the use of electrocautery. Temporary atrial and ventricular bipolar epicardial leads and external generator were used for maintaining A-V sequential pacing during the use of electrocautery. Before aortic cross-clamp was released after cardiac operation, regular cardiac rhythm could spontaneously be resumed with an integrated cardioplegic strategy, avoiding the use of defibrillator

• The Journal of the Society of Stroke on Korean Medicine
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• v.23 no.1
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• pp.41-54
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• 2022

Brady-arrhythmia is defined as an arrhythmia in which the heart rate slows to less than 60 beats per minute. Brady-arrhythmia reduces cardiac output and causes changes in blood flow. As a result, dizziness occurs because not only ischemia occurs in the central nervous system, but also blood flow in major organs decreases. The insertion of an artificial pacemaker is known as almost the only treatment alternative for patients with brady-arrhythmia with symptoms. This study reports a case of 85 year old male diagnosed with brady-arrhythmia complaining presyncope type of dizziness. The patient underwent complex Korean medicine treatments by herbal medicine, acupuncture and moxibustion. The daily average value of pulse rate, K-DHI score, NRS score and the patient's subjective expression of symptoms were used as evaluation tools. This study suggested a significant improvement in symptoms through complex Korean medicine treatments without the use of anti-arrhythmic drugs or insertion of an artificial pacemaker in the patient with brady-arrhythmia complaining dizziness.

• Journal of Korean Biological Nursing Science
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• v.23 no.4
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• pp.298-307
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• 2021

Purpose: This study aimed to investigate the risk factors for cardiac implantable electronic device (CIED)-related infections within the first post-procedural year after CIED insertion. Methods: This study included 509 adult patients undergoing CIED implantation procedures between January 1, 2011 and December 31, 2015. The data were analyzed by t-test, chi-square test, Fisher's exact test, and logistic regression analysis using SPSS/WIN 23.0. Results: Fifteen infections and 494 non-infections were examined. The CIED-related infection rate was 2.9%; patients with 14 pocket infections and one bacteremia were included in the CIED-related infection. The risk factors of CIED-related infections were the estimated glomerular filtration rate (eGFR) of ≤ 45 mL/min/1.73 m² (Odds ratio [OR]= 4.03, 95% confidence interval [CI],1.15-14.10) and taking a new oral anticoagulant (NOAC) (OR = 4.50, 95% CI 1.09-18.55). Conclusion: These results identified the CIED infection rate and risk factors of CIED-related infection. It is necessary to consider these risk factors before the CIED implantation procedure and to establish the relevant nursing interventions.