The effect of preoperative use of intra-aortic balloon pump in acute myocardial infarction without cardiogenic shock patients undergoing off-pump coronary artery bypass grafting / 中华胸心血管外科杂志

Objective To evaluate the efficacy and safety of preoperative intra-aortic balloon pump(IABP) insertion in acute myocardial infarction(AMI) without cardiogenic shock(CS) patients receiving off-pump coronary artery bypass grafting ( OPCABG).Methods 444 consecutive AMI patients who underwent isolated OPCABG from January 2009 to December 2016 were enrolled.158 patients who underwent preoperative IABP placement(IABP group) and the other of 286 patients who did not have IABP placement(control group).The in-hospital mortality rate, postoperative complications, mechanical ventilation time, ICU stay and hospital length were compared between the two groups.Results The overall mortality was 5.0%.135 pairs of patients were matched.The preoperative IABP insertion showed benefits in postoperative survival rate compared with the control group(0 vs.5.9%, P＝0.004).However, patients with preoperative IABP were more likely to prolong duration of mechanical ventilation and ICU stay.The postoperative length of stay in hospital didn't show significant difference between the two groups.Conclusion Survival advantage was observed from preoperative IABP insertion in AMI patients without CS under-going OPCABG.

Pulmonary oligemia maneuver can alleviate pulmonary artery injury during pulmonary thromboendarterectomy procedure / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Pulmonary thromboendarterectomy (PTE) has evolved as a treatment of choice for chronic thromboembolic pulmonary hypertension (CTEPH). This study aimed to characterize if pulmonary oligemia maneuver (POM) can alleviate pulmonary artery injury during PTE procedure.</p><p><b>METHODS</b>A total of 112 cases of CTEPH admitted to Beijing Anzhen Hospital from March 2002 to August 2011 received PTE procedure. They were retrospectively classified as non-POM group (group A, n = 55) or POM group (group B, n = 57). Members from group B received POM during rewarming period, whereas members from group A did not.</p><p><b>RESULTS</b>There were three (5.45%) early deaths in group A, no death in group B (0) (Fisher's exact test, P = 0.118). Six patients in group A needed extracorporeal membrane oxygenation (ECMO) as life support after the PTE procedure, no patients in group B needed ECMO (Fisher's exact test, P = 0.013). The patients in group B had a shorter intubation and ICU stay, lower mean pulmonary arterial pressure (mPAP) and pulmonary vascular resistance (PVR), higher partial pressure of oxygen in artery (PaO2) and arterial oxygen saturation (SaO2) and less medical expenditure than patients in group A. With a mean follow-up time of (58.3 ± 30.6) months, two patients in group A and one patient in group B died. The difference of the actuarial survival after the procedure between the two groups did not reach statistical significance. Three months post the PTE procedure, the difference of residual occluded pulmonary segment between the two groups did not reach statistical significance (P = 0.393).</p><p><b>CONCLUSION</b>POM can alleviate pulmonary artery injury, shorten ICU stay and intubation time, and lower down the rate of ECMO after PTE procedure.</p>

Analysis of factors related to acute renal failure post deep hypothermia circulatory arrest surgery of type A aorta dissection surgery / 中华外科杂志

<p><b>OBJECTIVES</b>To analyze risk factors associated to acute renal failure (ARF) post deep hypothermia circulatory arrest (DHCA) surgery of type A aorta dissection patients, researching correlations to hospital mortality rate.</p><p><b>METHODS</b>There were 273 samples of type A aorta dissection patients collected between September 2011 and May 2013 , all of which had surgery done under DHCA. Categorize the samples into two groups based on whether postoperative ARF happened: non-ARF group(n = 163) and ARF group(n = 110). Conducted regression analysis correlations between postoperative ARF and mortality and one or more risk factors of gender, age, history of illness, type of aorta dissection, heart functional class, pre- and post-operative serum creatinine (sCr), DHCA time, blood loss and blood transfusion volume, postoperative complications, etc.</p><p><b>RESULTS</b>Among the 110 samples of ARF group (40.3%), 21 (7.7%) conducted continuous renal replacement therapy (CRRT). Among 16 (5.9%) died in hospital, 3 (1.8%) died with functional renal, 13 (11.8%) died with ARF. Single factor analysis: male (χ(2) = 6.075, P = 0.014), preoperative sCr (t = 2.955, P = 0.004), dissection extended to renal artery(χ(2) = 5.103, P = 0.024), cardiopulmonary by-pass (CBP) time (t = 2.435, P = 0.017), DHCA time (t = 2.215, P = 0.031), average lower limb artery blood pressure during CBP (t = -2.832, P = 0.007), during surgery and 24 h postoperative blood loss (t = 2.157, P = 0.034) and blood transfusion (t = 2.426, P = 0.018), postoperative acute respiratory dysfunction (χ(2) = 36.307, P = 0.000), postoperative endotracheal reintubation (χ(2) = 9.167, P = 0.002), postoperative low blood pressure (χ(2) = 10.202, P = 0.001), postoperative temporary neurological deficits (χ(2) = 7.512, P = 0.006), postoperative infection (χ(2) = 11.088, P = 0.001) were the risk factors for ARF. The logistic regression analysis revealed that preoperative sCr (P = 0.023) and acute respiratory dysfunction (P = 0.011) were independent determinants of ARF; preoperative ARF (P = 0.022), CRRT (P = 0.003) and permanent neurological deficits were independent determinants for hospital mortality.</p><p><b>CONCLUSIONS</b>ARF is a common complication of post Type A aorta dissection surgery under DHCA, and is the risk factor of hospital mortality. It is important to enhance peri-operative protection of the renal function.</p>

Extracorporeal membrane oxygenation support in acute cardiorespiratory function failure patients after cardiac surgery / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate the treatment experience of extracorporeal membrane oxygenation (ECMO) support after cardiac surgery.</p><p><b>METHODS</b>Retrospectively analyze the clinical data of 117 postoperative patients supported with ECMO in cardiac intensive care unit from March 2005 to June 2008. There were 32 female and 85 male patients, with a mean age of (48.7 +/- 16.5) years old. The cardiac operations included coronary artery bypass grafting (n = 20), coronary artery bypass grafting and remodeling of left ventricle (n = 9), coronary artery bypass grafting and valvular operation (n = 5), repair of ventricular septal perforation following acute myocardial infarction (n = 2), valvular operation (n = 46), heart transplantation (n = 20), lung heart transplantation and repair of ventricular septal defect (n = 1), correction of congenital heart defects (n = 10), aortic operations (n = 4). Venoarterial bypass was instituted in 115 for hemodynamic failure and venovenous in 2 patient for hypoxemia following cardiac surgery. ECMO was established in 110 patients by cannulation of the right atrium and femoral artery, and 5 of the right atrium and ascending aorta. And 2 case added left atrial drainage to ECMO. Heparin was infused to maintain the whole blood activated coagulation time (ACT) of 160 to 200 s in centrifugal pump (14 cases), and 200 to 250 s in roller pump (3 cases) to avoid thrombotic events. This was administered until decannulation. Intra-aortic balloon pump was used in 15 patients and continuous renal replacement therapy in 29 cases.</p><p><b>RESULTS</b>Mean ECMO duration was 61 h (ranged 3 to 225 h) and the mean duration of ICU stay was 5 d. 87 patients (74.4%) were successfully weaned from ECMO. 69 patients (59.0%) survived to discharge. The most common complications were re-exploration for bleeding (n = 24) and alimentary tract hemorrhage (n = 14), renal failure required renal replacement therapy (n = 29), infection(n = 32), limb ischemia (n = 5), plasma leak of oxygenators (n = 29), hemolysis (n = 7), neurological complication (n = 4).</p><p><b>CONCLUSIONS</b>ECMO is an effective mechanical assistance method for short-term treatment of postoperative cardiorespiratory failure. Indication should be controlled strictly. Earlier institution of ECMO and prevent complication may improve outcome.</p>

Combined endocardial and epicardial radiofrequency modified Maze procedure in the treatment of atrial fibrillation / 中华外科杂志

<p><b>OBJECTIVE</b>To evaluate the effectiveness of the combined endocardial and epicardial saline-irrigated radiofrequency modified maze procedure for the treatment of atrial fibrillation (AF).</p><p><b>METHODS</b>During a period of 3 years, 295 patients with AF having concomitant cardiac surgery underwent the procedure. Patients underwent either the endocardial and epicardial group (n=185) or the endocardial group (n=110) radiofrequency ablation. There were 124 males, 171 females with a mean age of (52 +/- 11) year old. Mean duration of preoperative AF was 36 +/- 43 months. And about 90.8 percent valve pathology was rheumatic. Valve operation was performed in 289 patients, coronary artery bypass graft surgery in 19 patients and congenital heart disease operation in 6 patients respectively. Follow-up for the whole patients ranged from 3 to 47 months (mean 28 +/- 5 months).</p><p><b>RESULTS</b>Ten patients died postoperatively (3.4%). Four patients died of low cardiac output, five patients died of multisystem and organ failure, one patient died of cerebral hernia. There were 2 patients died of nerves system complication during follow-up. At the end of the procedure 228 patients (77.3%) were sinus rhythm, including 78 patients (70.9%) in endocardial group while 150 patients (81.1%) in endocardial and epicardial group (P<0.05). At late follow-up, 191 of 259 patients (73.7%) were in stable sinus rhythm. Sinus rhythm was present in 64 patients (66.0%) in endocardial group while 127 patients (78.4%) in endocardial and epicardial group (P<0.05). Histopathology of the endocardial group revealed foci coagulative necrosis was limited to the endocardial side. While endocardial and epicardial ablation had full-thickness alteration of atrial tissue besides ill defined borders and inflammatory cell infiltration.</p><p><b>CONCLUSIONS</b>Combined endocardial and epicardial saline-irrigated radiofrequency modified maze procedure was performed safely and efficiently. And it restored sinus rhythm better than endocardial ablation only.</p>

The application of extracorporeal membrane oxygenation for surgical treatment of coronary artery disease / 中华外科杂志

<p><b>OBJECTIVE</b>To summarize the results and experiences on extracorporeal membrane oxygenation (ECMO) for post-cardiac surgery of coronary artery disease.</p><p><b>METHODS</b>From June 2004 to November 2006, sixteen patients with the mean age of (58 +/- 11) years old undergoing cardiac surgical procedures were placed on ECMO using a heparin-bonded circuit. Fourteen patients were male and two patients were female. Thirteen patients underwent on pump coronary artery bypass surgery (CABG) and three patients underwent off-pump coronary artery bypass grafting. The duration of ECMO support, stay of intensive care unit (ICU stay), complications and turnovers were recorded.</p><p><b>RESULTS</b>The mean duration of ECMO support was 51 hours, and the mean duration of ICU stay was 5 days. Thirteen patients (81.3%) were successfully weaned form ECMO, ten patients (62.5%) were discharged from hospital. The main complications were bleeding, infection, renal failure and ischemia of the lower limbs with the incidence of 18.8%, 37.5%, 25% and 18.8% respectively.</p><p><b>CONCLUSION</b>ECMO is an acceptable technique for shortterm treatment of refractory low cardiac output after cardiac surgery of coronary artery disease.</p>

Clinical analysis in 34 cases of paravalvular leakage after valve replacement / 中华外科杂志

<p><b>OBJECTIVE</b>To study the treatment of paravalvular leakage (PVL) after cardiac valve replacement retrospectively.</p><p><b>METHODS</b>Between 1993 and 2005, 34 patients with PVL were observed, including aortic PVL in 6 patients and mitral valve PVL in 28 patients. Twenty-five patients with severe anemia and/or heart failure were reoperated, 9 patients without severe clinical symptoms and signs had treated conservatively. Repair of PVL was carried out in 14 patients, and the other 10 patients were performed prosthetic valve replacement.</p><p><b>RESULTS</b>Of 9 patients who had treated conservatively, 1 patients died of septic shock, and 1 patient died of heart failure. During 6 - 72 months follow-up, of the seven survivals, 2 patients died of heart failure. And the other 5 patients were in NYHA class II. Echocardiography demonstrated no obvious enlargement of the PVL and diameter of the heart. Among the 25 patients who were reoperated, the overall operative mortality was 12% (3 patients). Twenty-one survivals were in NYHA class II during the follow-up of 4 - 132 months. While a mitral valve PVL and a aortic valve PVL were diagnosed among them after the reoperation 4 years and 6 months respectively.</p><p><b>CONCLUSIONS</b>Patients with PVL and no severe symptoms can be treated conservatively and followed up. A more aggressive surgical treatment is recommended for patients with PVL and severe anemia and/or heart failure.</p>

Outcome of surgical treatment of post-traumatic tricuspid insufficiency / 中华创伤杂志(英文版)

<p><b>OBJECTIVE</b>To investigate the optimal time and procedure of surgical treatment of traumatic tricuspid insufficiency.</p><p><b>METHODS</b>From May 1984 to September 2004, eight patients underwent operation for traumatic tricuspid valve insufficiency. All patients, male, aged from 7 to 67 years median: 38 years, mean: (38.5 +/- 18.1) years. The intervals between trauma and operation ranged from 1 month to 20 years median: 19 months, mean: (52.5 +/- 80.3) months). In seven patients, tricuspid insufficiency was attributed to blunt chest trauma including vehicle accident in three patients and the other patient is a stab wound. Diagnosis was confirmed by echocardiography. Pre-operative cardiac functions in patients were classified as New York Heart Association (NYHA) classes II-IV. During operation, the anterior leaflet of the tricuspid valve was completely or partially flailed as a result of chordal rupture in all patients. Chordal rupture of septal leaflet was found in one patient. Anterior leaflet was perforated in two patients. Septal leaflet was retracted and adherent to ventricular septum in two patients. Valve repair was intended for all patients. Finally, valve repair was performed successfully in 3 patients and tricuspid replacement was performed in 5 patients.</p><p><b>RESULTS</b>No early or late death occurred. With a follow-up through clinical manifestation and echocardiography for 7-129 months median: 39 months, mean: (53.4 +/- 42.8) months, all patients were classified as NYHA class I, without any changes.</p><p><b>CONCLUSIONS</b>The satisfactory treatment of traumatic tricuspid insufficiency can be obtained by surgical treatment. Earlier surgery may increase the feasibility of tricuspid valve repair and prevent the deterioration of right ventricular function.</p>

Surgical management for Stanford A aortic dissection / 中华外科杂志

<p><b>OBJECTIVE</b>To summarize the surgical experience for Stanford A aortic dissection.</p><p><b>METHODS</b>Sixty-eight patients with Stanford A aortic dissection underwent surgery from March 1998 to October 2004, acute aortic dissection in 45 cases, chronic aortic dissection in 23 cases. The operation were performed by using moderate hypothermic cardiopulmonary bypass in 53 cases, deep hypothermic circulatory arrest (DHCA) and retrograde cerebral perfusion (RCP) in 11 cases; DHCA with antegrade selective cerebral perfusion (SCP) in 4 cases. Surgical procedures included ascending aortic grafting in 7 cases, ascending and hemiarch grafting in 6, ascending and total arch grafting in 3, ascending and total arch grafting with Frozen elephant trunk procedure in 4. Concomitant procedures included Bentall procedure in 34 cases, Wheat procedure in 12 cases, aortic valvuloplasty in 2 cases, mitral valvuloplasty in 1 cases. Urgent surgery was in 39 cases (emergency surgery in 19).</p><p><b>RESULTS</b>Operative mortality was 7% (urgent surgery mortality was 8%, elective surgery mortality was 7%). Fifty-eight cases were followed up for (37 +/- 22) months. Actuarial survival of 58 cases at 1, 3 and 5 years was 100%, 95% and 86% respectively.</p><p><b>CONCLUSION</b>The choice of surgical procedures depend on the location of intimal tear for Stanford A aortic dissection. Proper surgical indication, technique and brain protections are the key factors of Stanford A aortic dissection surgery.</p>