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 compare clinical outcomes between modified and traditional Morrow procedures for the treatment of hypertrophic obstructive cardiomyopathy (HOCM). MethodsForty-two HOCM patients undergoing surgical correction in Beijing Anzhen Hospital between January 2005 and July 2011 were recruited in this study. According to different surgical techniques, all the patients were divided into 2 groups. In traditional Morrow procedure group, there were 16 patients including 13 males and 3 females with their age of 49±15 years. In modified Morrow procedure group, there were 26 patients including 14 males and 12 females with their age of 40±18 years. Preoperative and postoperative echocardiography were performed to compare ventricular septal thickness (VST), left ventricular outflow tract velocity (LVOTV)and left ventricular outflow gradient (LVOG)between the 2 groups. ResultsVST, LVOTV and LVOG of HOCM patients were significantly reduced after both traditional and modified Morrow procedure. There was statistical difference in preoperative and postoperative VST (23.10±3.64 mm vs. 17.38±4.39 mm), LVOTV (433.08±101.68 mm/s vs. 248.46±101.88 mm/s)and LVOG (78.57±40.16 mm Hg vs. 4.29±21.52 mm Hg)in traditional Morrow procedure group (P < 0.05). There was statistical difference in preoperative and postoperative VST (25.04±47.05 mm vs. 18.38±6.55 mm, P < 0.05), LVOTV (414.83±83.33 mm/s vs. 159.72±60.84 mm/s, P < 0.05)and LVOG (77.94±29.16 mm Hg vs. 17.56±9.39 mm Hg, P < 0.05)in modified Morrow procedure group (P < 0.05). Preoperative and postoperative difference in LVOG of modified Morrow procedure group was more significant than that of traditional Morrow procedure group (74.25±27.91 mm Hg vs. 34.63±30.66 mm Hg, P < 0.05). ConclusionModified Morrow procedure is superior to traditional Morrow procedure in reducing postoperative LVOG for HOCM patients.
Dilated cardiomyopathy (DCM) is a highly prevalent disease which has multiple clinical manifestations and pathological features. With the characteristics of multi-sequence and multi-parameter, cardiac magnetic resonance imaging (MRI) can accurately assess the morphology, function and tissue characterization of heart, and provide comprehensive information for diagnosis of DCM. This review focuses on the sequences and clinical applications of MRI evaluation in DCM in order to provide additional information for clinical diagnosis, treatment and prognosis.
ObjectiveTo explore the association between preoperative, perioperative parameters, especially estimated glomerular filtration rate (eGFR) and postoperative atrial fibrillation (POAF) after modified extended Morrow procedure.MethodsA total of 300 hypertrophic obstructive cardiomyopathy (HOCM) patients who underwent modified extended Morrow procedure in our hospital from January 2012 to March 2018 were collected. There were 197 (65.67%) males and 103 (34.33%) females with an average age of 43.54±13.81 years. Heart rhythm was continuously monitored during hospitalization. The patients were divided into a POAF group (n=68) and a non-POAF group (n=232). The general data, perioperative parameters and echocardiographic results were collected by consulting medical records for statistical analysis. Univariate and multivariate logistic regression models were used to analyze the risk factors for POAF.ResultsOverall incidence of POAF during hospitalization was 22.67% (68/300). Compared with patients without POAF, patients with POAF were older, had higher incidence of chest pain and syncope, lower level of preoperative eGFR, higher body mass index and heart function classification (NYHA), larger preoperative left atrial diameter and left ventricular end diastolic diameter, and longer ventilator-assisted time, ICU stay and postoperative hospital stay. Age, heart function classification (NYHA)≥Ⅲ, hypertension, syncope history and eGFR were independent risk factors for POAF. Receiver operating characteristic curve analysis showed that the area under the curve of eGFR was 0.731 (95%CI 0.677-0.780, P<0.001), and the sensitivity and specificity were 82.4% and 57.8%, respectively.ConclusionIncreased age, high preoperative heart function classification (NYHA), hypertension, preoperative syncope history and decreased eGFR are independent risk factors for POAF in HOCM patients who underwent surgical septal myectomy. Preoperative decreased eGFR can moderately predict the occurrence of POAF after modified extended Morrow procedure.
Abstract：?Objective?To analyze surgical procedures and clinical outcomes for patients with hypertrophic obstructive cardiomyopathy （HOCM） complicated by infective endocarditis.?Methods?We retrospectively analyzed clinical data of 7 patients with HOCM complicated by infective endocarditis who underwent modified Morrow procedure，removal of intracardiac vegetation，and valve replacement in Fu Wai Hospital from Sep. 2006 to Feb. 2012. There were 5 male patients and 2 female patients with their mean age of 39.80±13.60 years（ranging 21-55）. Postoperative clinical outcomes were observed. Preoperative and postoperative left ventricular outflow tract （LVOT） gradients， left atrium （LA） diameter，left ventricular ejection fraction （LVEF） and heart function were compared.?Results?There was no in-hospital death and perioperative survival rate was 100% in this group. Bacteria vegetations were multiply detected on the mitral valve leaflet （7 cases）， aortic valve leaflet （4 cases） and ventricular septum （1 case） with their diameter of 2-19 mm. Blood culture showed Staphylococcus aureus （3 cases），Squirrel aureus （1 case） . Postoperatively， first-degree atrioventricular block occurred in 2 patients， complete left bundle branch block in 1 patient， left anterior division block in 2 patients， and all these complications were not treated. Postoperative LVOT gradient and LA diameter were significantly lower than preoperative values （P＜0.05）， and cardiac function was significantly improved in these patients. All the patients underwent transthoracic echocardiography at a mean follow-up of 13.00±17.19 （1-49） months in outpatient service. The clinical symptoms of all these patients were diminished or significantly ameliorated and their quality of life was considerably improved. All the patients had NYHA classⅠorⅡ without any reintervention or death during follow-up.?Conclusion?Modified Morrow procedure and valve replacement is a good surgical strategy for patients with HOCM complicated by infective endocarditis with satisfactory early and mid-term clinical outcomes.
Objective To summarize the surgical treatment strategies and the clinical outcomes of hypertrophic obstructive cardiomyopathy (HOCM) with severe mitral regurgitation. Method We retrospectively analyzed the clinical data of 23 patients of HOCM with severe mitral regurgitation in our hospital from January 2004 through January 2014 year. There were 14 males and 9 females, aged from 15-71(50.2±15.4) years. The preoperative left ventricular outflow tract gradient (LVOTPG) of these patients was 75-161(98.1±19.3) mm Hg. And the septal thickness was 25.8±2.8 mm. All 23 patients had at least moderate mitral regurgitation and systolic anterior motion (SAM). All of them had extend septal myectomy (extend Marrow procedure) and mitral valve repair(MVP),while 4 patients with atrial fibrillation had left atrial ablation and left atrial appendage operation. Results All patients were successfully operated. The left ventricular outflow tract pressure gradient was 16-39(26.9±4.9) mm Hg when the cardiopulmonary bypass stopped and SAM phenomenon was completely eliminated. Except for 2 mitral valve patients with trace amounts of regurgitation, 1 patient with mild regurgitation, the other 20 patients of mitral regurgitation were completely corrected. All patients survived after operation and only 1 patient suffered from transient complete atrioventricular block and then back to normal sinus rhythm. A long-term follow-up from 6 months to 126 months with an average of 53.1±34.9 months showed no late postoperative death. No mitral regurgitation need reoperation. Two patients had mild reflux. Four patients were of trace reflux. The left ventricular outflow tract the maximum pressure gradient was less than 42 mm Hg. The thickness of interventricular septum dropped from preoperative 25.8±2.8 mm to postoperative 14.1±1.3 mm (P<0.001) . No recurrence was noted in the 3 patients with atrial fibrillation. And one patient still had paroxysmal atrial fibrillation. Long term follow-up of the patients' symptoms disappeared or with only mild symptoms. And quality of their life improved significantly. And there was no long-term complication, reoperation, or death. Conclusions The extensive septal myectomy can completely dredge left ventricular outflow tract stenosis and eliminate SAM phenomenon. The mitral valve repair can correct mitral regurgitation. The comprehensive surgical treatment strategy can achieve a good long-term therapeutic effect.
目的:本文通过研究白介素23受体(IL-23R)基因多态性与扩张型心肌病(DCM)的相关性,探讨DCM患者的免疫遗传学发病机制. 方法:采用PCR-RFLP方法测定DCM患者和正常对照者IL-23R基因rs7517847位点的单核苷酸多态性. 用卡方检验比较病例组与对照组之间基因型频率和等位基因频率的统计学差异。结果:IL-23R基因rs7517847位点单核苷酸多态基因型和等位基因频率在DCM组与正常对照组之间无差异。结论:本研究未发现IL-23R基因rs7517847位点多态性与DCM相关。
We tried to explore the value of contrast echocardiography (CEcho) on evaluating hypertrophic cardiomyopathy (HCM) with the inferior wall hypertrophy. A total of 114 patients with HCM were investigated. All the patients received CEcho and routine echocardiography (Echo), and 45 of them received cardiac magnetic resonance (CMR) and 47 of them received Holter. The frequency and percentage of inferior wall hypertrophy were analyzed in HCM patients, as well as the structure and function. The results showed that: (1) Inferior wall hypertrophy was detected in 55 patients (48%) by Echo, while 68 patients (60%) by CEcho. (2) There was no significant difference between CMR and CEcho in the measurement of inferior wall at end-diastole and end-systole. Thickness of inferior wall by CEcho tended to be higher than CMR. However, the inferior wall thickness measured by Echo was obviously lower than that by CMR (P < 0.05) and CEcho ( P < 0.05). (3) Bland-Altman plot suggested good consistency between CEcho and CMR in measuring inferior wall thickness. 95% CI of mean differences in inferior wall thickness between CEcho and CMR were smaller in HCM patients as compared with that between Echo and CMR. Unary linear regression analysis showed good degree of fitting between CEcho and CMR. (4) Holter showed that HCM patients with inferior wall hypertrophy were likely to have higher incidence of premature ventricular complexes (PVC) ≥ 500/24 h. We demonstrate that CEcho is rather sensitive in detecting inferior wall hypertrophy. Echo may underestimate the inferior wall thickness. The risk of ventricular premature beats may increase in HCM patients with inferior hypertrophy.
ObjectiveTo analyze the surgical procedures and clinical effects of surgical treatment for patients with hypertrophic obstructive cardiomyopathy (HOCM). MethodsWe retrospectively analyzed the clinical data of sixty-five consecutive patients with HOCM who underwent modified Morrow procedure in Wuhan Asia Heart Hospital between June 2010 and December 2013. There were 40 males and 25 females with mean age of 48.4±11.5 years (ranged 18-70 years). ResultsThere was no in-hospital mortality. There was no valve injury or ventricular septal perforation occurred during operation. Postoperative LVOT gradient, interventricular septum (IVS), left ventricular end-diastolic diameter (LVEDD), left ventricular ejection fraction (LVEF) and mitral regurgitation (MR) were significantly lower than preoperative values (P<0.05). Complete atrioventricular block occurred in 3 patients, complete left bundle branch block occurred in 7 patients, and left anterior division block occurred in 3 patients. All patients were followed up for 6-35 months. During the following-up time, the clinical symptoms diminished in 55 patients and ameliorated significantly in other 10 patients. All patients had a NewYork Heart Association functional class Ⅰ/Ⅱ during the follow-up. ConclusionSurgical septal myectomy can eliminate obstruction of left ventricular outflow tract and relief symptoms obviously. The early and mid-term outcomes are satisfactory.