Publications by authors named "Michael Z Tong"

Article Synopsis
  • The BeSPoKE technique is a surgical method used to enlarge the aortic outflow tract in adults with complex heart issues, specifically those facing aortic stenosis and prosthesis-patient mismatch.
  • A study involving 25 adults showed significant improvement in aortic valve gradients post-surgery, with a median size increase of the prosthesis and no reports of operative mortality.
  • Postoperative complications included atrial fibrillation and heart block, but overall survival at two years was high at 92%, indicating that this technique is a safe and effective option for patients with small left ventricular outflow tracts.
View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to assess if using multiple arterial grafts in redo coronary artery bypass grafting (CABG) offers any advantages over using a single arterial graft.
  • Over a 40-year period, researchers examined data from 6,559 patients who underwent isolated redo CABG, matching those who received multiarterial grafts with those who received single arterial grafts to evaluate in-hospital complications and long-term survival.
  • Results indicated that multiarterial grafting was linked to lower in-hospital mortality and better long-term survival rates, especially in males with two internal thoracic artery grafts.
View Article and Find Full Text PDF
Article Synopsis
  • In patients with heart failure-related cardiogenic shock due to cardiac amyloidosis, using an intra-aortic balloon pump (IABP) may enhance hemodynamic stability and support their transition to advanced therapies like heart transplants.
  • A study reviewed 23 patients with cardiac amyloid who received IABP and found a 1-year survival rate of 74%, with 65% of them progressing to heart transplants.
  • The use of IABP notably increased mean arterial pressure and cardiac indices while decreasing various pressures related to heart function, indicating significant improvement in their cardiovascular status.
View Article and Find Full Text PDF
Article Synopsis
  • Recent advances in understanding pericardial diseases and the use of multimodal imaging have significantly improved the diagnosis and treatment approaches.
  • Pericardiectomy is advised for serious cases like chronic constrictive pericarditis and requires a team of specialists for the best patient outcomes.
  • Performing radical pericardiectomy at high-volume medical centers with skilled staff enhances the likelihood of a successful surgery and recovery.
View Article and Find Full Text PDF

Objectives: To identify preoperative predictors of postcardiotomy cardiogenic shock in patients with ischemic and nonischemic cardiomyopathy and evaluate trajectory of postoperative ventricular function.

Methods: From January 2017 to January 2020, 238 patients with ejection fraction <30% (206/238) or 30% to 34% with at least moderately severe mitral regurgitation (32/238) underwent conventional cardiac surgery at Cleveland Clinic, 125 with ischemic and 113 with nonischemic cardiomyopathy. Preoperative ejection fraction was 25 ± 4.

View Article and Find Full Text PDF
Article Synopsis
  • * A study conducted from 2008 to 2022 involved 2,324 patients undergoing 2,352 multivalve reoperations, revealing that complexity and urgency of the surgery increase mortality risk.
  • * Findings suggest that elective, isolated surgeries have a low mortality rate and that understanding surgical complexity and patient health factors can guide better decision-making in surgical settings.
View Article and Find Full Text PDF

Purpose Of Review: The purpose of this review is to discuss the evolving techniques and approaches for pericardiectomy, with a focus on the use of cardiopulmonary bypass (CPB) and the extent of radical pericardial resection. The review aims to highlight the benefits and considerations associated with these modifications in radical pericardiectomy.

Recent Findings: Recent studies have demonstrated that the use of CPB during pericardiectomy does not increase procedural risk or negatively impact survival.

View Article and Find Full Text PDF

Purpose Of Review: The surgical management of patients undergoing coronary artery bypass grafting (CABG) with low ejection fraction presents unique challenges that require meticulous attention to details and good surgical technique and judgement. This review details the latest evidence and best practices in the care of such patients.

Recent Findings: CABG in patients with low ejection fraction carries a significant risk of perioperative mortality and morbidity related to the development of postcardiotomy shock.

View Article and Find Full Text PDF

Purpose: To compare dual-energy computed tomography (DECT) based qualitative and quantitative parameters in chronic thromboembolic pulmonary hypertension with various postoperative primary and secondary endpoints.

Materials And Methods: This was a retrospective analysis of 64 patients with chronic thromboembolic pulmonary hypertension who underwent DECT. First, a clot score was calculated by assigning the following score: pulmonary trunk-5, each main pulmonary artery-4, each lobar-3, each segmental-2, and subsegmental-1 per lobe; the sum total was then calculated.

View Article and Find Full Text PDF

Spontaneous coronary artery dissection is an uncommon cause of myocardial ischemia. Conservative management is the mainstay, although a few patients will require revascularization. We present a case of a 31-year-old woman whose extensive dissection necessitated coronary artery bypass grafting requiring an extended arteriotomy for excision of the thrombus and dissection flap.

View Article and Find Full Text PDF

The Ross procedure allows replacement of a diseased aortic valve with pulmonary root autograft, possibly avoiding the highly thrombotic mechanical valves and immunologic deterioration of tissue valves in antiphospholipid syndrome (APS). Here, we present the use of the Ross procedure in a 42-year-old woman with mild intellectual disability, APS, and a complex anticoagulation history after she presented with thrombosis of her mechanical On-X aortic valve previously implanted for non-bacterial thrombotic endocarditis.

View Article and Find Full Text PDF

Advanced heart failure (HF) therapies improve survival in patients with stage D HF. We sought to evaluate differences by race/ethnicity and sex in advanced HF therapy referrals and decision-making across a multicenter survey. We performed a retrospective analysis of patients referred for evaluation for advanced HF therapies at 9 centers (n = 515) across the United States.

View Article and Find Full Text PDF

Background: We examined the incidence, postoperative outcomes, and patient-related factors associated with preincision cardiac arrest in patients undergoing cardiac surgery.

Methods: We retrospectively examined adult patients undergoing elective or urgent cardiac surgery at the Cleveland Clinic between 2008 and 2019. The incidence of preincision cardiac arrest, defined as arrest between induction of general anesthesia and surgical incision, was reported.

View Article and Find Full Text PDF

Objective: To evaluate the outcomes of surgical resection of malignant primary cardiovascular tumors.

Methods: From 1983 to 2018, 32 patients underwent surgical resection of malignant primary cardiovascular sarcoma at Cleveland Clinic. Mean age was 48 ± 15 years, and 19 (59%) were women.

View Article and Find Full Text PDF

Patients with thoracic aortic disease commonly present with concomitant multisegment pathology. We describe the patient population, analyze outcomes, and define the patient selection strategy for valve-preserving aortic root reimplantation (VPARR) combined with the arch procedure. From 2008 to 2018, 98 patients underwent VPARR combined with the aortic arch procedure (hemi-arch, 50% [ = 49, limited repair]; total arch, 50% [ = 49, complete repair] including 39 with elephant trunk).

View Article and Find Full Text PDF

Background: The incremental utility of right ventricular (RV) strain on predicting right ventricular failure (RVF) following left ventricular assist device (LVAD) implantation, beyond clinical and haemodynamic indices, is not clear.

Methods: Two hundred and forty-six (246) patients undergoing LVAD implantation, who had transthoracic echocardiograms pre and post LVAD, pulmonary artery pulsatility index (PAPI) measurements and Michigan risk score, were included. We analysed RV global longitudinal strain (GLS) using speckle tracking echocardiography.

View Article and Find Full Text PDF

Background: Transcatheter aortic valve replacement (TAVR) is now frequently performed for severe aortic stenosis. Data regarding cardiac operations after TAVR are limited, however. Therefore, we investigated patient characteristics, operative timing and indications, and outcomes of these operations in a single-center experience.

View Article and Find Full Text PDF