Mid-term outcomes and hemodynamic performance of the St Jude Medical Epic aortic bioprosthesis for severe aortic stenosis.

The St. Jude Medical Epic Supra valve is a porcine bioprosthesis designed for complete supraannular implantation. No report has shown the hemodynamic performance and clinical outcomes of aortic valve replacement with the Epic Supra valve for severe aortic stenosis in a Japanese cohort. We retrospectively evaluated 65 patients who underwent aortic valve replacement using the Epic Supra valve for aortic stenosis at our department between May, 2011 and October, 2016. The mean follow-up period was 68.7 ± 32.7 months, and the follow-up rate was 89.2%. The mean age was 76.8 ± 5.3 years. The 1-, 5-, and 8-year survival rates were 96.9%, 79.4%, and 60.3%, respectively. The rates of freedom from valve-related events were 96.6% and 81.9% at 5 and 8 years, respectively. Four patients were diagnosed with structural valve deterioration (SVD), and reintervention was performed in two patients. The rates of freedom from SVD were 98.2% and 83.3% at 5 and 8 years, respectively, and the mean time to diagnosis of SVD was 72.5 ± 25.3 months. The mean pressure gradient (MPG) was 16.8 ± 6.0 mmHg postoperatively, 17.5 ± 9.4 mmHg at 5 years, and 21.2 ± 12.4 mmHg at 8 years (p = 0.08). The effective orifice area index (EOAI) was 0.95 ± 0.2 cm2/m2 immediately after surgery, 0.96 ± 0.27 cm2/m2 at 5 years, and 0.84 ± 0.2 cm2/m2 at 8 years (p = 0.10). An increase in MPG and decrease in EOAI were also observed, which may be associated with SVD. Follow-up after 5 years is important to determine if there is an increase.

[Stanford Type A Acute Aortic Dissection Accompanying Aberrant Right Subclavian Artery:Report of a Case].

A 64-year-old man was transferred to our hospital due to a diagnosis of Stanford type A acute aortic dissection complicated by cardiac tamponade. He was in shock status as well. Careful inspection of contrast- enhanced computed tomography revealed Kommerell's diverticulum with the aberrant right subclavian artery running behind the esophagus. The artery connected to the right axillary artery. The left vertebral artery was separately branched from the aortic arch. Primary entry was not detected on the preoperative computed tomography( CT). Left ventricular function was preserved by transthoracic echocardiography. At emergency surgery, total aortic arch replacement with reconstruction of the right axillary artery, both carotid arteries, and the left subclavian artery along with the left vertebral artery was successfully performed. The aberrant right subclavian artery was ligated at the origin. Kommerell' s diverticulum was completely excluded. Postoperative contrast-enhanced CT showed the patency of all reconstructed arteries. Although he suffered from acute cholecystitis and persistent bilateral pleural effusion, he was discharged in a good condition.

[Stanford Type A Acute Aortic Dissection Associated with Polycystic Kidney Disease].

Whereas cerebral aneurysm is a well-known consequence of autosomal dominant polycystic kidney disease (ADPKD), acute aortic dissection has been rarely reported. A patient was a 44-year-old male with a diagnosis of ADPKD, who had previously undergone transcatheter arterial embolization for a renal cyst hemorrhage. He presented with sudden onset of back pain, which got worse at emergency service. Contrast-enhanced computed tomography (CT) revealed Stanford type A acute aortic dissection. The patient subsequently underwent partial aortic arch replacement with a vascular graft under circulatory arrest. His postoperative course was complicated by pneumonia and required ventilation support for a week. Peak creatinine level was 3.28 mg/dl, but hemodialysis was not required. Patients with ADPKD should be considered a high-risk cohort of aortic dissection.

[Idiopathic Ascending Aortic Thrombosis with Multiple Embolism:Report of a Case].

Ascending aorta thrombosis unaccompanied by an aneurysm or a primary hypercoagulable state is rare. We report a surgical case of ascending aorta thrombosis with multiple emboli. A 44-year-old woman visited the hospital for evaluation of dysarthria and was diagnosed with multiple cerebral infarcts. Contrast-enhanced computed tomography (CT) revealed a mass in the ascending aorta and the brachiocephalic artery. We performed emergency removal of the masses and endarterectomy with cardiopulmonary bypass under hypothermic circulatory arrest. Histopathological examination of the resected specimen showed thrombi. The patient had an uneventful recovery and was discharged 12 days postoperatively. No recurrent thrombus or hypercoagulable state was observed for 3 years postoperatively.

[Surgical Removal of a Transvenous Pacemaker Lead with the Right Atrial Perforation:Report of a Case].

Cardiac perforation by a transvenous pacemaker lead is an uncommon, but serious complication. Management strategies in pacemaker lead cardiac perforation depend on the symptoms, the presence of pericardial effusion, hemodynamic status, and injured neighboring organs. A 70-year-old man was admitted due to suspicious right atrial perforation with pneumothorax secondary to a transvenous pacemaker lead. Right atrial perforation was confirmed on computed tomography (CT). A large laryngopharyngeal hemangioma compressing the trachea was also observed. Although he was hemodynamically stable, we chose a surgical removal of a transvenous pacemaker lead considering his large laryngopharyngeal hemangioma. A tracheotomy followed by lower hemisternotomy were performed. A perforated pacemaker lead was observed on the right atrium. The lead was pulled out, and a hole in the right atrium was fixed. His postoperative course was uneventful.

Hemodynamic performance of INSPIRIS RESILIA aortic bioprosthesis for severe aortic stenosis: 2-year follow-up in Japanese cohort.

The INSPIRIS RESILIA aortic bioprosthesis (Edwards Lifesciences LLC, Irvine, USA) was fixed in novel tissue preservation technology to ensure long-term durability. Hemodynamic performance after aortic valve replacement (AVR) for severe aortic stenosis (AS) has not been published in the Japanese cohort. Twenty-nine patients underwent AVR with INSPIRIS RESILIA bioprosthesis for severe AS between November 1, 2018 and December 31, 2020. The mean age was 75.1 ± 4.5 years with 19 female patients. Body surface area was 1.58 ± 0.19 m2 and New York Heart Association functional class was 2.2 ± 0.5. Hemodynamic performance was assessed using follow-up transthoracic echocardiographic data collected at 3-6 months, 1 year and 2 years. The mean follow-up time was 19.2 ± 7.2 months, with a 100% follow-up rate. One patient died of postoperative heart failure. The preoperative mean and peak transvalvular pressure gradients (PGs) were 51.9 ± 18.4 mmHg and 89.3 ± 34.9 mmHg, respectively, and effective orifice area 0.72 ± 0.26 cm2. They improved at 10.2 ± 3.5 mmHg (p < 0.0001), 19.3 ± 6.6 mmHg (p < 0.0001) and 1.73 ± 0.47cm2 (p < 0.0001) at discharge. The mean transvalvular PG at 3-6 months (n = 24), 1 year (n = 25) and 2 years (n = 15) was 11.2 ± 3.8 mmHg (p < 0.0001), 11.1 ± 3.2 mmHg (p < 0.0001) and 11.2 ± 3.3 mmHg (p < 0.0001), respectively. Left ventricular mass index decreased from 123.0 ± 35.0 g/m2 before surgery to 113.4 ± 35.0 g/m2 (p = 0.0133) at discharge. It has dropped to 88.0 ± 25.0 g/m2 (p = 0.0007) at 2 years. Constrictive pericarditis caused heart failure in one patient. INSPIRIS RESILIA bioprosthesis showed improved hemodynamic performance in the early postoperative phase. There were fewer valve-related events observed.

[Surgical Removal of a Fractured Guide Wire for Coronary Angioplasty and Coronary Artery Bypass Grafting:Report of a Case].

Guide wire fracture is a rare, yet potentially life-threatening complication of percutaneous coronary intervention. A 65-years old man underwent emergent coronary angioplasty for myocardial ischemia. Percutaneous coronary intervention for the residual lesions of left anterior descending artery (LAD) was planned. The protection guide wire for left circumflex artery( LCx) was entangled in the stent in LAD. Despite many attempts, the wire could not be retrieved. Finally, the wire was fractured and the stent in LAD was deformed. The patient was sent to our service to remove the fractured wire. We performed urgent removal of the guide wire and coronary artery bypass grafting( CABG). The postoperative course was uneventful. The timing of surgical removal of the guide wire and the indication for coronary artery reconstruction should be discussed by heart team.

[Surgery for a Massive Left Atrial Myxoma, Four Hours after a Thrombectomy for a Cerebral Embolism:Report of a Case].

A 48-year-old female patient was transferred with dysarthria and left-sided hemiplegia. Contrast-enhanced computed tomography revealed occlusion of the first branch of the right middle cerebral artery, for which an emergency thrombectomy was successfully performed within 2 hours of patient's initial symptoms. Postoperatively, transthoracic echocardiography revealed a massive mobile left atrial mass, measuring approximately 65×30 mm, a part of which moved in and out of the mitral valve without significant mitral regurgitation. Embolisms to the kidneys and the spleen were demonstrated. Another emergency cardiac surgery was performed, 4 hours after the thrombectomy, to resect the mass from the fossa oval with the atrial septum;the defect was closed using autologous pericardium. The histopathological findings of the specimen were consistent with a myxoma. The patient completely recovered and was discharged when ambulatory. We have discussed the importance of the timing of surgical intervention in the context of patients undergoing cardiac surgery after a cerebral embolism.

[Surgical Outcomes of Mycotic Aneurysm of the Aortic Arch].

Mycotic aneurysm of the aortic arch is a rare, but critical entity. We reviewed our surgical experience of mycotic aneurysm of the aortic arch. Between January 2007 and December 2015, we operated on six patients who had mycotic aneurysm of the aortic arch. The mean age was 72 years old, and four males were included. Preoperative white blood cell count was 18,266/µl and C-reactive peptide was 18.5 µg/dl, respectively. The initial presentations included fever( n=2), hoarseness( n=2), weakness of a leg( n=1), dyspnea (n=1) and hemoptysis (n=1). Preoperative blood cultures were positive in three patients. All patients underwent a total aortic arch repair with a four-branched vascular tube, and five received pedicled omental grafting. One patient who did not receive pedicled omental grafting died of recurrence of infection on postoperative day 21, and the other died of multi-organ failure on postoperative day 77. We experienced tracheostomy( n=1), minor stroke( n=1), and atrial fibrillation( n=1). During the follow-up period, no recurrence of infection was observed in four survivors. Our surgical strategy is satisfactory to achieve good clinical outcomes.

[Primary Volvulus of the Small Intestine Mimicking Nonocclusive Mesenteric Ischemia Following Open-heart Surgery].

A 73-year-old female who underwent aortic valve replacement with a biological valve, coronary artery bypass, and left atrial appendage closure had sudden onset of nausea and abdominal pain 43 days after surgery. She had a history of nonocclusive mesenteric ischemia on 4th postoperative day, for which conservative management was successfully carried out. A contrast-enhanced computed tomography(CT) was performed because a recurrence of nonocclusive mesenteric ischemia was suspected. It revealed a whirl sign in the small intestine, suggestive of small intestine volvulus. At the subsequent emergency laparotomy, volvulus caused severe congestion in the small intestine, aproximately 40 cm from the cecum. However, there was no evidence of transmural necrosis, and reduction of torsion notably improved blood supply to the small intestine. Her regular diet was resumed on 4th postoperative day, and her postoperative course was uneventful. Volvulus should be considered as a differential diagnosis in the setting of acute abdominal pain after open-heart surgery.

[Amiodarone-induced Ventricular Tachycardia after Coronary Artery Bypass Grafting;Report of a Case].

A 57-year-old man on maintenance hemodialysis was admitted to a hospital after suffering from cardiac arrest. He had collapsed soon after hemodialysis and was restored to sinus rhythm after receiving direct-current shocks. Further examination revealed old myocardial infarction with triple-vessel disease, and he was referred to our hospital for surgical treatment. Soon after performing coronary artery bypass grafting, we started the patient on intravenous amiodarone for frequent ventricular tachycardia. However, incessant ventricular tachycardia occurred frequently which necessitated several countershocks. Although ventricular tachycardia disappeared by replacing intravenous amiodarone with intravenous nifekalant, it reappeared when we initiated oral amiodarone instead of intravenous nifekalant. So therefore, we stopped using any anti-arrhythmic drug except bisoprolol fumarate, whereby ventricular tachycardia ceased once again. Amiodarone is known as relatively safe anti-arrhythmic drug that is often used after cardiovascular surgery. However, we should pay close attention to the possibility of amiodarone-induced arrhythmia.

Comparison of the Long-Term Outcomes of Mechanical and Bioprosthetic Aortic Valves　- A Propensity Score Analysis.

BACKGROUND: The aim of this study was to assess the long-term outcomes of aortic valve replacement (AVR) with either mechanical or bioprosthetic valves according to age at operation.Methods and Results:A total of 1,002 patients (527 mechanical valves and 475 bioprosthetic valves) undergoing first-time AVR were categorized according to age at operation: group Y, age <60 years; group M, age 60-69 years; and group O, age ≥70 years). Outcomes were compared on propensity score analysis (adjusted for 28 variables). Hazard ratio (HR) was calculated using the Cox regression model with adjustment for propensity score with bioprosthetic valve as a reference (HR=1). There were no significant differences in overall mortality between mechanical and bioprosthetic valves for all age groups. Valve-related mortality was significantly higher for mechanical valves in group O (HR, 2.53; P=0.02). Reoperation rate was significantly lower for mechanical valves in group Y (HR, 0.16; P<0.01) and group M (no events for mechanical valves). Although the rate of thromboembolic events was higher in mechanical valves in group Y (no events for tissue valves) and group M (HR, 9.05; P=0.03), there were no significant differences in bleeding events between all age groups. CONCLUSIONS: The type of prosthetic valve used in AVR does not significantly influence overall mortality.

Twenty-year outcome of aortic valve replacement with St. Jude Medical mechanical valves in Japanese patients.

BACKGROUND: Bioprostheses have become increasingly popular for aortic valve replacement (AVR) in recent years, but mechanical valves are still the standard choice, especially for younger patients. The aim of this study was to assess the very long-term outcomes in Japanese patients who underwent AVR with St. Jude Medical (SJM) mechanical valves. METHODS AND RESULTS: From 1991 to 2001, a total of 816 patients underwent AVR with SJM mechanical valves in 5 hospitals. Of these, 801 patients (mean age, 58.3±11.7 years) were analyzed in this study. There were 24 in-hospital deaths (3.0%). Mean follow-up duration was 11.6±6.7 years and the 10-year follow-up rate was 84.1%. Freedom from valve-related death at 5, 10, 15, and 20 years was 96.2%, 92.7%, 88.8%, and 86.6%, respectively. The linearized ratio of major bleeding events and thromboembolic events was 1.1% per patient-year and 1.0% per patient-year, respectively. Freedom from reoperation for the aortic prosthesis was 98.0% and 94.8% at 10 and 20 years, respectively. CONCLUSIONS: The SJM mechanical valve provided excellent long-term freedom from valve-related death and reoperation in patients undergoing AVR. Therefore, this valve should be recommended to younger patients who wish to avoid reoperation.

Long-term durability of pericardial valves in the aortic position in younger patients: when does reoperation become necessary?

BACKGROUND: We sought to assess the long-term durability of pericardial valves in patients at age <65 years undergoing aortic valve replacement (AVR), and to determine the timing of redo operations due to structural valve deterioration (SVD). METHODS: From 1986 to 2001, a total of 574 adult patients underwent AVR with pericardial valves in nine hospitals in Japan. Of these, 53 patients were at age <65 years (group Y). These patients were compared with those of age ≥ 65 (group O, n = 521). RESULTS: The mean follow-up duration was 9.5 years in group Y and 8.1 years in group O. Freedom from reoperation due to SVD was 100% at five years, 90.8% at 10 years, and 47.2% at 15 years in group Y, and 99.3% at five years, 97.4% at 10 years, and 94.4% at 15 years in group O (log-rank test, p < 0.01). In those who required redo AVR in group Y (n = 12), the mean time from initial operation to reoperation was 12.1 years. The reoperation-free survival curve started to decline after eight years postoperation in group Y. CONCLUSIONS: Redo AVR started to become necessary eight years after surgery in the patients who underwent AVR with pericardial valve at age <65 years. In addition, approximately half of those patients required reoperation due to SVD by 15 years postoperatively.

Long-term outcome of the carpentier-edwards pericardial valve in the aortic position in Japanese patients.

BACKGROUND: According to the Japanese Circulation Society guidelines, a bioprosthesis is recommended for aortic valve replacement (AVR) in patients aged ≥65 years who have no risk factors for thromboembolism. There are few data, however, regarding the actual durability of bioprosthetic valves in Japanese patients. The purpose of this study was to assess the long-term durability of Carpentier-Edwards pericardial (CEP) valves in Japanese AVR patients, and to assess the risk factors for reoperation due to structural valve deterioration (SVD). METHODS AND RESULTS: From 1986 to 2001, a total of 591 patients underwent AVR with CEP valves in 9 hospitals. Of these, 574 patients (mean age, 71.9±8.5 years) were analyzed in this study. There were 26 in-hospital deaths (4.5%). The 10-year follow-up rate was 82.6% and the median follow-up time was 9.2 years. Freedom from reoperation due to SVD was 99.5%, 96.7%, and 87.5% at 5, 10, and 15 years, respectively. Factors that raised the risk of reoperation due to SVD included younger age at operation and history of prior operation. In patients aged ≥65 years, freedom from reoperation due to SVD was 94.4% at 15 years. CONCLUSIONS: The durability of CEP valves in patients with AVR was excellent, especially in elderly patients. Thus, it seems appropriate to follow the current Japanese Circulation Society recommendations for the use of bioprosthetic valves.

Effective application of a direct-acting oral anticoagulants reversal agent in acute type A aortic dissection repair: A case report.

There are insufficient reports on the use of andexanet alfa in cardiac surgery. A 67-year-old man was diagnosed with type A aortic dissection and performed emergent surgery. His medical history included atrial fibrillation treated with Edoxaban. We performed total arch replacement. Despite administration of enough protamine, fresh frozen plasma, and platelet administration, controlling bleeding was difficult. Thus, Andexanet Alfa was initiated after CPB withdrawal. Surgical bleeding was dramatically controlled after its administration. There were no findings suggestive of an embolic event. In conclusion, administration of Andexanet Alfa is safe after cardiopulmonary bypass withdrawal.

Impact of persistent malperfusion syndrome following central repair of acute type A aortic dissection on early outcomes.

We investigated impact of persistent malperfusion syndrome (MPS) following central repair of acute type A aortic dissection (ATAAD) on outcomes. Thirty patients who underwent central repair for ATAAD with MPS were included. Patients were divided into two groups:23 patients without MPS following central repair (No-MPS group) and 7 with MPS (Persistent-MPS group). The mean age was 66.8±9.6 and 59.4±13.4 years in the No-MPS and Persistent-MPS groups, respectively (P=0.176). Preoperative MPS included the left coronary artery (n=3), brain (n=3), abdomen (n=7), and extremities (n=11) in the No-MPS group. In the Persistent-MPS group, the right coronary (n=1), brain (n=2), abdomen (n=3), and extremities (n=5) were observed. In the No-MPS group, one patient died of extensive cerebral infarction (4.3%). In the Persistent-MPS group, 2 patients died of sepsis and multi-organ failure, respectively (28.6%) (P=0.061). The Persistent-MPS group had more patients requiring hemodialysis than the No-MPS group (P=0.009). Three patients underwent intestinal resection due to persistent MPS (P<0.001). Persistent MPS following central repair for ATAAD significantly contributed to outcomes. J. Med. Invest. 71 : 158-161, February, 2024.

Outcomes of ascending aorta and partial arch replacement with entry resection for DeBakey type I acute aortic dissection.

OBJECTIVES: This study investigated early and late outcomes between ascending aorta/partial arch replacement and total arch replacement with entry resection in DeBakey type I acute aortic dissection (DIAAD) repair. METHODS AND RESULTS: This study included 98 patients who underwent DIAAD repair from January 2005 to December 2020. Seventy-four patients underwent ascending aorta and partial arch replacement with entry resection (Non-TAR group), and 24 underwent total arch replacement with entry resection (TAR group). The mean follow-up period was 4.8 ± 3.2 years. The follow-up rate was 92.3%. The mean age in the Non-TAR and TAR groups was 68.8 ± 10.4 years and 61.6 ± 13.7 years, respectively (P = 0.046). No difference in preoperative shock and malperfusion syndrome was observed between the groups. Hospital death was observed in 5.4% and 12.5% of the Non-TAR and TAR groups, respectively (P = 0.241). Postoperative permanent neurologic deficits and temporary hemodialysis were more frequently seen in the TAR compared to the Non-TAR group (P = 0.03 and 0.003, respectively). The 5-year survival rates were 95.1% ± 3.4% and 89.2% ± 7.2% in the Non-TAR and TAR groups, respectively (Log-rank P = 0.603). Freedom from downstream aorta-related reinterventions at 5 years was 87.8% ± 4.5% and 64.1% ± 11.0% in the Non-TAR and TAR groups, respectively (Log-rank P = 0.007). Three patients in each group underwent thoracic endovascular aortic repair for residual aortic dissection. CONCLUSIONS: Early and late outcomes in the Non-TAR group were satisfactory compared to those in the TAR group. Entry resection with graft replacement remains a standard approach in DIAAD repair.

Fixation devices made of poly-L-lactide composite for rib reconstruction after thoracotomy.

GRAND FIX mesh-type plates and pins (Gunze, Kyoto, Japan) are thin, bioabsorbable fixation devices made of poly-L-lactide (PLLA) composite. These devices are new, and how best to use them in clinical practice remains to be determined. Thus, we describe our approach to rib fixation after thoracotomy in an aortic surgery using GRAND FIX mesh-type plates and pins. The advantage of our approach is that it is easy to perform, but careful attention should be paid to fix the ribs appropriately.