Atrial fibrillation （AF） as a most frequent arrhythmia has a high incidence of 79% in patients with mitral valve disease. Thrombosis, embolization and serious arrhythmia can be caused by AF. There is the recrudescent tendency in using drugs to recover the sinus rhythm, surgery and radio frequency ablation can only cure a part of patients. By now the pathogenesis of AF is not known clearly. The pathogenesis of AF from virulence gene, cardiac electrophysiology, connecxins, cell ultramicrostructure and cell signaling system are reviewed in this article.
ObjectivesTo systematically review the efficacy of traditional Chinese medicine for arrhythmia caused by anthracycline drugs.MethodsPubMed, EMbase, The Cochrane Library, CBM, CNKI, WanFang Data databases were electronically searched to collect randomized controlled trials (RCTs) on the efficacy of traditional Chinese medicine for arrhythmia caused by anthracycline drugs from inception to October 2017. Two reviewers independently screened literature, extracted data and evaluated risk of bias of included studies. Meta-analysis was then performed by Revman 5.3 software.ResultsA total of 4 RCTs involving 312 patients were included. The results of meta-analysis showed that: the incidence of tachycardia in the Wenxin granule treatment group was lower than that in the control group (RR=0.35, 95%CI 0.18 to 0.67, P=0.002). Baoxinkang was more effective than antioxidant western medicine in protecting myocardial SOD activity (RR=2.25, 95%CI 1.74 to 2.76, P<0.000 01). But there was no significant difference between two groups on the incidence of atrial premature beats (RR=0.40, 95%CI 0.15 to 1.08,P=0.07), premature ventricular contractions (RR=0.56, 95%CI 0.23 to 1.34, P=0.19) and atrial fibrillation (RR=0.41, 95%CI 0.11 to 1.53, P=0.18). In addition, there was no significant difference between Wenxin granules and amiodarone in treating arrhythmia induced by anthracycline. The addition of Wenxin granules on the basis of anthracycline antitumor chemotherapy regimens was not effective in delaying disease progression compared with anthracycline alone. Wenxin granules could not change the SOD level of breast cancer patients with cardiotoxicity caused by anthracycline chemotherapy, compared with chemotherapy and basic treatment.ConclusionsThe current evidence shows that Wenxin granules can prevent and reduce anthracycline-induced tachycardia, but its efficacy in improving the overall efficiency, preventing and reducing atrial premature beats, premature ventricular contractions, atrial fibrillation, and SOD levels are unclear. Baoxinkang can protect myocardial SOD activity. Due to limited quality and quantity of the included studies, more high quality studies are required to verify above conclusions.
ObjectiveTo systematically review the clinical efficacy of potassium magnesium aspartate in prevention of arrhythmia after cardiac heart surgery. MethodsSearching PubMed, MEDLINE, EMbase, The Cochrane Library (Issue 5, 2014), CNKI, VIP and WanFang Data to collect randomized controlled trials (RCTs) about the clinical efficacy of potassium magnesium aspartate in prevention of arrhythmia after cardiac heart surgery from the date of establishment of the databases to May 2014. Literature screening according to the inclusion and exclusion criteria, data extraction and methodological quality assessment of the included studies were completed by two reviewers independently. Meta-analysis was then conducted by RevMan 5.2 software. ResultsA total of nine RCTs involving 825 patients were enrolled. The results of meta-analysis indicated that: compared with the control group, timely giving supplement of potassium magnesium aspartate before and after surgery significantly reduced the incidences of arrhythmia (OR=0.25, 95%CI 0.09 to 0.69, P=0.008), premature beats (OR=0.08, 95%CI 0.03 to 0.23, P < 0.000 01), tachycardia (OR=0.29, 95%CI 0.17 to 0.49, P < 0.000 01) and 24 h low cardiac output (OR=0.27, 95%CI 0.10 to 0.72, P=0.009); and increased auto-resuscitation rates (OR=12.16, 95%CI 4.82 to 30.68, P < 0.000 01), with significant differences. However, the two groups were alike in the incidences of atrial fibrillation (OR=0.05, 95%CI-0.16 to 0.05, P=0.34) and ventricular fibrillation (OR=1.24, 95%CI 0.73 to 2.13, P=0.43). ConclusionPotassium magnesium aspartate is effective in prevention of arrhythmias after cardiac surgery, and protective to the myocardium. However, compared with conventional treatment it cannot significantly decrease the incidences of atrial fibrillation and ventricular fibrillation. Due to the limited quantity and quality of the included studies, more multi-centre high quality RCTs with large sample size are needed to verify the above conclusion.
Atrial fibrillation is the most common arrhythmia in clinical practice, and catheter ablation has become a first-line treatment strategy. Among them, cryoballoon ablation has become a standardized treatment for atrial fibrillation due to its advantages such as short surgical time, short learning curve, and minimal patient pain. Currently, a large amount of clinical practice and research have provided new evidence for cryoballoon ablation as a first-line treatment for atrial fibrillation. Therefore, this article provides a review of the current status of catheter ablation, the current status, challenges faced, and prospects as a first-line catheter ablation strategy for atrial fibrillation of cryoballoon ablation, with the aim of providing reference for cardiologists in clinical decision-making in the initial rhythm control of atrial fibrillation.
ObjectiveTo analyze the perioperative safety and the short-term prognosis of non-small cell lung cancer (NSCLC) patients with preoperative arrhythmia. MethodsThe clinical data of NSCLC patients treated in the Department of Cardiothoracic Surgery, the First Affiliated Hospital of Chongqing Medical University from August 2020 to March 2021 were collected and observed. The patients were divided into an arrhythmia group and a control group according to whether there was arrhythmia in the 24 h ambulatory electrocardiogram examination report before operation. The incidence of intraoperative and postoperative cardiovascular events and short-term prognosis were compared between the two groups. Results A total of 466 patients were included in this study, including 338 patients in the arrhythmia group, 176 males and 162 females, with a median age of 68.0 (63.0, 72.0) years, and 128 patients in the control group, 59 males and 69 females, with a median age of 66.5 (60.0, 72.0) years. A total of 26 patients (7.7%) in the arrhythmia group were placed with temporary pacemakers before operation. There was no significant difference in the incidence of cardiovascular related events between the two groups [100 (29.6%) vs. 28 (21.9%), P=0.096]. The incidence of postoperative arrhythmia events in the arrhythmia group was higher than that in the control group [112 (33.1%) vs. 11 (8.6%), P<0.001]. The average postoperative ICU stay in the arrhythmia group was longer than that in the control group (1.1±0.7 d vs. 1.0±0.6 d, P=0.039). ConclusionPreoperative arrhythmia does not increase the risk of intraoperative cardiovascular events in NSCLC patients, but increases the incidence of postoperative arrhythmia events and prolongs ICU stay.
Objective To summary the clinical experiences of ventricular septal myotomymyectomy on hypertrophic obstructive cardiomyopathy(HOCM) and investigate the treatment strategies during perioperative period for better clinical results. Methods From October 1996 to June 2009, 62 patients with HOCM underwent surgical treatment. There were 41 male and 21 female, aged 668 years with mean 34.05 years. The ventricular septal myotomymyectomy operation (Morrow operation or modified Morrow operation) was performed through the aortic incision under general anesthesia and hypothermic cardiopulmonary bypass (CPB). The concomitant operations included coronary artery bypass grafting (5 cases), mitral valve replacement (12 cases), mitral valve plasty(9 cases), aortic valve replacement (4 cases), tricuspid valve plasty(2 cases) and ductus arteriosus closure (2 cases). During the perioperative period, the patients were examined by echocardiography or transesophageal echocardiograph(TEE), electrocardiogram or dynamic echocardiogram and chest radiography. Left atrial diameter，left ventricular enddiastolic [CM(159mm]diameter，left ventricular outflow tract (LVOT) pressuregradient，interventricular septal thickness, ejection fraction[CM)](EF), the changes of mitral valve construction and function were evaluated. Results The time of CPB and aortic occlusion were 104.23±47.14 min and 66.76±36.32 min, respectively. The endotracheal intubation time was 13.23±11.76 h and the postoperative intensive care unit(ICU) stay was 42.53±37.41 h. Four patients died and the mortality was 6.45％(4/62). The main causes of death included septic shock complicated with acute renal failure(1 case), refractory arrhythmia, ventricular fibrillation, atrial flutter complicated with severe low cardiac output syndrome (1 case), severe acute renal failure(1 case) and Ⅲ°atrioventricular(AV) block complicated with low cardiac output syndrome(1 case). Postoperative left atrial diameter (34.56±6.45 mm vs.43.46±7.21 mm，t=6.948,P=0.000), left ventricular enddiastolic diameter (37.14±6.31 mm vs.42.03±6.23 mm，t=3.145,P=0.020), LVOT pressure gradient (23.54±17.78 mm Hg vs. 103.84±44.04 mm Hg,t=13.618,P=0.000) and interventricular septal thickness (17.12±5.67 mm vs.26.93±5.23 mm, t=10.694,P=0.000) decreased significantly compared with those before operation. There was no mitral valve regurgitation, or only mild mitral valve regurgitation. No systolic anterior motion(SAM) was found. The main postoperative arrhythmias included complete left bundle branch block, intraventricular block, complete atrioventricular block and atrial fibrillation. All the 58 cases were cured and discharged. Fiftythree cases were followed up for 3 months12 years, and 5 cases were lost. No death, complication and reoperation were found. Symptoms relieved significantly. The cardiac function was in New York Heart Association grade Ⅰ-Ⅱ. The quality of life improved significantly. Conclusion Most patients with HOCM can achieve satisfactory relief of LVOT obstruction and SAM via ventricular septal myotomymyectomy. The main arrhythmias after operation are bundle branch block and atrial fibrillation. Satisfactory effects can be achieved by accurate surgical technique and effective drug treatments.
ObjectiveTo analyze the occurrence of arrhythmia in patients during the recovery period of anesthesia, in order to take appropriate measures in nursing care to ensure the safety of patients. Method We carried out a retrospective analysis of 18 931 general anesthesia post-operative patients (aged 16-84 years old) transferred to anesthesia recovery from September 2012 to July 2013, and we observed the incidence rate of arrhythmia, and documented the clinical manifestations of the patients. ResultsDuring the anesthesia recovery, out of 18 931 general anesthesia postoperative patients, 269 cases of arrhythmia occurred, and the incidence rate was 1.42%. Twenty minutes after nursing intervention and use of medication, the difference of systolic blood pressure, bradycardic heart rate, and tachycardic heart rate of the patients were statistically better than those beofre the treatment (P＜ 0.05) . ConclusionEarly discovery and analysis of arrhythmia in patients during anesthesia recovery, along with timely provision of analgesic and antiarrhythmic treatment can effectively improve the circulation status of the patients, thus ensure the safety of the patients during anesthesia recovery.
ObjectiveTo investigate the clinical efficacy and safety of carvedilol in the treatment of arrhythmia in patients with hypertension complicated with diabetes mellitus. MethodsWe selected the patients with hypertension complicated with diabetes mellitus who were hospitalized in the Harrison International Peace Hospital Affiliated to Hebei Medical University for treatment from Oct. 2011 to Oct. 2013. The cases were divided into a trial group and a control group. The control group was given routine treatment (eg., hypoglycaemic drugs, angiotensin converting enzyme inhibitors). On the basis of the same treatment of the control group, the trial group was given carvedilol. The efficacy and adverse reaction were observed, recorded and then analyzed between the two groups. ResultsA total of 140 patients were included (70 cases in each group). With the loss of 10 cases in the control group, the data of 70 cases in the trial group and 60 cases in the control group were finally analyzed. The results showed that the trial group was superior to the control group in the total effectiveness (χ2=8.320, P=0.004) and the dynamic ECG improvement of premature ventricular contraction (χ2=5.333, P=0.014) with significant differences. Both groups were significantly improved in blood pressure and heart beats compared with the situation before treatment (Both P < 0.05), and the trial group was better than the control group with a significant difference. During the treatment, three cases in the trial group had mild gastrointestinal symptoms which spontaneously disappeared later. ConclusionThe clinical effectiveness of carvedilol for arrhythmia in patients with hypertension complicated with diabetes mellitus is significant. It is safe and effective which is recommended in clinical application.
The judgment of the type of arrhythmia is the key to the prevention and diagnosis of early cardiovascular disease. Therefore, electrocardiogram (ECG) analysis has been widely used as an important basis for doctors to diagnose. However, due to the large differences in ECG signal morphology among different patients and the unbalanced distribution of categories, the existing automatic detection algorithms for arrhythmias have certain difficulties in the identification process. This paper designs a variable scale fusion network model for automatic recognition of heart rhythm types. In this study, a variable-scale fusion network model was proposed for automatic identification of heart rhythm types. The improved ECG generation network (EGAN) module was used to solve the imbalance of ECG data, and the ECG signal was reproduced in two dimensions in the form of gray recurrence plot (GRP) and spectrogram. Combined with the branching structure of the model, the automatic classification of variable-length heart beats was realized. The results of the study were verified by the Massachusetts institute of technology and Beth Israel hospital (MIT-BIH) arrhythmia database, which distinguished eight heart rhythm types. The average accuracy rate reached 99.36%, and the sensitivity and specificity were 96.11% and 99.84%, respectively. In conclusion, it is expected that this method can be used for clinical auxiliary diagnosis and smart wearable devices in the future.
ObjectiveTo discuss the anesthetic procedure for left thoracic sympathectomy under thoracoscope for long QT syndrome patients. MethodsWe selected 8 patients with long QT syndrome classified American Society of Anesthesiologists Ⅱ-Ⅲ who were going to undergo left thoracic sympathectomy under thoracoscope between July 2011 and October 2014 as our study subjects. They were given a moderate amount of beta blockers before operation, inducted with 0.1 mg/kg midazolam, 3-6 μg/kg fentanyl, 2-4 mg/kg propofol, 0.3-0.6 mg/kg cis-atracurium, and maintained with propofol 1-4 mg/(kg·h) combined with 0.025-2.000 μg/(kg·min) fentanyl. We recorded the mean arterial pressure (MAP), heart rate (HR), pulse oxygen saturation (SpO2) and airway peak pressure, and end-tidal carbon dioxide before anesthesia induction (T0), at endotracheal intubation (T1), during artificial lung-collapse when surgery initiated (T2), 5 minutes after surgery initiation (T3), 15 minutes after surgery initiation (T4), during artificial lung-collapse at the end of surgery (T5) and during extubation (T6). ResultsWhen compared with T0, T2 got a higher MAP, T3 and T4 had a slower HR (P<0.05), but all were within a normal range. All the patients showed little change in airway peak pressure and end-tidal carbon dioxide during the surgery with no statistically significant difference (P>0.05). ConclusionProper anesthetic procedure for left thoracic sympathectomy under thoracoscope for long QT syndrome patients can reduce the incidence of perioperative malignant arrhythmia.