Splenic flexure cancer: is right extended hemicolectomy better than left hemicolectomy?

INTRODUCTION: There is no consensus on the optimal surgery for splenic flexure cancers. METHODS: Review of a prospectively maintained database of patients with splenic flexure cancer undergoing either a right extended hemicolectomy or left hemicolectomy at a tertiary care cancer hospital from 14.5.2010 to 16.9.2021. The primary outcome measures were postoperative morbidity and hospital stay with secondary outcomes being overall survival, disease-free survival, and long-term patient reported functional and quality of life outcomes. RESULTS: The demographic variables were evenly distributed between groups, and median follow-up was 44 months. The groups were comparable in terms of postoperative morbidity (Clavien-Dindo complication ≥ 3a 10.6% vs 10%, p = 0.322) and hospital stay (8 days vs 7 days, p = 0.316). Oncological outcomes were similar in both groups (3-year disease-free survival 71.8% vs 67.8%, p = 0.877, and 3-year overall survival 83.9% vs 75.8%, p = 0.787), and long-term patient-reported functional outcomes were excellent in both groups. CONCLUSION: Oncological outcomes, post operative morbidity, and long-term patient reported functional outcomes are comparable in patients undergoing either a right extended or left hemicolectomy for splenic flexure cancer.

Fractional Flow Reserve and Intravascular Ultrasound of Coronary Artery Lesions Beyond the Left Main: A Review of Literature.

Determining the severity of intermediate coronary artery lesions is a clinical dilemma. Physiologic assessment of these lesions can establish the presence of ischemia to justify percutaneous coronary intervention (PCI). Approximately 50% of patients undergo PCI without any noninvasive, cardiac, function testing to assess for myocardial ischemia. Intravascular ultrasound (IVUS) is a highresolution, tomographic imaging modality used to identify vessel size, morphology, and its subsequent layers. The use of IVUS continues to evolve with applications in understanding plaque composition and burden, determination of reference diameter and appropriate stent placement after PCI, assessment for cardiac allograft vasculopathy after cardiac transplantation, and possible identification of vulnerable plaques which may lead to future coronary events. We review the literature related to the use of IVUS in intermediate, non-left main lesions of the coronary vasculature and its correlation with fractional flow reserve (FFR). Given the paucity of randomized controlled clinical trials in this area, it is difficult to make conclusions regarding the best cutoff value for IVUS which may correlate to ischemia producing lesions.

Routine Angiographic Follow-Up After Coronary Artery Disease Revascularization: Is Seeing Believing?

PURPOSE OF THE REVIEW: Coronary artery disease is a major cause of mortality and morbidity in the world, and PCI and CABG account for over a million procedures performed annually in the USA. The goal of percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) is to achieve complete revascularization (CR) if at all possible. However, restenosis and stent thrombosis (ST) remain the Achilles heel of contemporary PCI with restenosis rates between 10 and 30% with bare metal stents to 5-15% after drug-eluting stents and ST rates of around 0.8 vs 1.2%, respectively. Routine angiography after revascularization seems theoretically attractive as this may allow intervention before clinical events occur. In this manuscript, we review the literature regarding routine angiography after PCI or CABG and its outcomes. RECENT FINDINGS: According to the 2016 update from the American Heart Association (AHA), 15.5 million people above the age of 20 have coronary heart disease (CHD) in the USA. The prevalence of CHD is now almost similar in both men and women, and one American suffers from a myocardial infarction (MI) every 42 s. Recent data from randomized clinical trials and observational studies does not support the use of routine coronary angiography after revascularization in asymptomatic patients. There are some studies which show that routine angiography may have a role in left main or complex coronary interventions; however, these findings are exploratory and were not seen in randomized trials. After reviewing the data on routine angiography after coronary revascularization, we came to the conclusion that current data does not support the use of routine angiography for asymptomatic patients. However, there is a lack of randomized controlled trial in this field with only one recent trial reporting negative outcomes.

Persistent atrial standstill following the Cox-maze III procedure: reversal with sustained atrial pacing.

Atrial standstill is a rare disorder of cardiac rhythm that is characterized by total absence of electrical activity in one or both atria. We report herein the case of a patient with atrial fibrillation and symptomatic 4.0 s pauses who received a ventricular demand pacemaker. The patient later underwent mitral valve replacement with a pericardial tissue valve and the Cox-maze III procedure for symptomatic mitral stenosis and atrial fibrillation. Following surgery, he developed atrial standstill and became pacemaker dependent. The pacemaker was later revised to an atrioventricular sequential pacemaker. Twelve hours after revision, atrioventricular sequential pacing was noted and mechanical function of the atria was confirmed by Doppler echocardiography.

Initial Experience of a Primary Urgent Care Clinic Curriculum and Subspecialty Lectureship Series Implementation in a Los Angeles County Hospital.

OBJECTIVES: Urgent care clinics are extremely busy in the University of California-Los Angeles (UCLA) County hospital system. We determined that residents and medical students in the internal medicine residency program who are rotating through these clinics did not receive enough teaching during their rotation. We decided to create and implement an urgent care curriculum and lectures to help achieve structure for the rotation. The goal of this series was to educate and assist residents in the primary care setting to comfortably manage subspecialty conditions, help reduce the already-overwhelmed county subspecialty referral system, and promote learning. METHODS: The Olive View-UCLA Medical Center internal medicine residency program has a total of 74 residents, which includes postgraduate year-1 (PGY-1) to PGY-4, with PGY-4 being combined internal medicine-pediatrics or emergency medicine-internal medicine residents. We used core curriculum topics as provided by the Accreditation Council for Graduate Medical Education to design the curriculum. We sent e-mails to the stakeholders whom we identified as the residents and the attending physicians working in urgent care, inquiring after topics they wanted to discuss during the rotation. Using these responses we compiled a list of all of the topics that could be discussed and reviewed during the rotation. These topics were broken down into short 10- to 15-minute-long lectures. During the lectures, we provided a retrospective post- then prequestionnaire to the residents for evaluation of the program and the lectures. A benefit of the post-then-pre design is that participants answer the postquestions and the prequestions together after the lecture, thereby reducing the possibility of response shift bias. RESULTS: Of the 74 residents in the program, 25 responded; the response rate was approximately 33%. Regarding content, 92% (23) said it was appropriate, 4% (1) said it was too low a level, and 4% (1) did not respond. Overall, 36% (9) said the lecture was excellent, 52% (13) said it was very good, 8% (2) said it was good, and 4% (1) did not respond. We also looked at the number of referrals made pre- and postcurriculum implementation and found that the overall referral percentage was down, from 34% to 31%. CONCLUSIONS: We designed an urgent care curriculum and lecture series for the primary urgent care clinics to promote learning and education in a structured, succinct, and systematic manner. This will help triage and manage subspecialty conditions in the scope of primary care settings and thus initiate appropriate and timely referrals to subspecialists.

Robotic System for MRI-guided Focal Laser Ablation in the Prostate.

MRI-conditional robotic platforms have proved to be an effective approach for image guided interventions. In this study, a computer-assisted, pneumatically-actuated robot was designed, built, and tested for MRI-guided prostate cancer focal laser ablation (FLA). The robotic manipulator provides two active planar degrees of freedom (DoFs) by using a customized CoreXY frame, and one passive rotational DoF. A remote insertion mechanism improves the surgical workflow by keeping the patients inside the scanner during needle insertion. The robotic manipulator was tested in a 3T MR scanner to evaluate its MR compliance, and the results demonstrated that the signal-to-noise ratio (SNR) variation was less than 8%. The in-scanner template positioning accuracy test demonstrated that the manipulator achieves high targeting accuracy with a mean error of 0.46 mm and a standard deviation of 0.25mm. Phantom studies have shown that the needle insertion accuracy of the manipulator is within 2mm (Mean = 1.7mm, StD = 0.2mm).

Infection and Lupus: Which Causes Which?

Infection is a leading cause of morbidity and mortality among patients with systemic lupus erythematous (SLE). Dysfunction of the innate and adaptive immune systems increases the risk of infection in patients with SLE. Infectious agents have also been theorized to play a role in the pathogenesis of SLE. This article summarizes our current knowledge of the infectious risk SLE patients face as a result of their underlying disease including abnormal phagocytes and T cells as well as the increased risk of infection associated with immunosuppressive agents used to treat disease. Pathogens thought to play a role in the pathogenesis of disease including EBV, CMV, human endogenous retroviruses (HERVs), and tuberculosis will also be reviewed, as well as the pathologic potential of microbial amyloids and the microbiome.

Preoperative Cardiac Evaluation in Kidney Transplant Patients: Is Coronary Angiography Superior? A Focused Review.

Cardiovascular disease is the major cause of morbidity and mortality in chronic kidney disease patients. Because of a higher occurrence of asymptomatic coronary artery disease and increased perioperative cardiovascular mortality in kidney transplant patients, screening for coronary artery disease before transplant surgery is essential. Various studies have shown that cardiac stress testing is an unreliable screening method in these patients because of significant variability in sensitivity and negative predictive value. We suggest that high-risk candidates such as those with diabetes or a prior history of myocardial infarction, stroke, peripheral vascular disease, or coronary artery disease should perhaps be considered for coronary angiography rather than stress testing as cardiac screening before kidney transplantation.

Sensitivity of brachial versus femoral vein injection of agitated saline to detect right-to-left shunts with Transcranial Doppler.

BACKGROUND: Transcranial Doppler (TCD) can detect a right-to-left shunt (RLS) with high sensitivity but has a 5% chance of a false negative study. TCD is usually performed with injection of agitated saline into an arm vein. We compared the sensitivity of TCD performed from the brachial versus femoral veins. METHODS: Patients presenting to the cardiac catheterization laboratory for percutaneous closure of a patent foramen ovale (PFO) were enrolled. Power M-mode Transcranial Doppler (Terumo 150 PMD) was conducted. After injection of a mixture of 8 cc of agitated saline, 0.5 cc of air, and 1 cc of blood into the brachial vein, embolic tracks were counted over the middle cerebral arteries. The degree of RLS was evaluated by TCD at rest, and with Valsalva at 40 mmHg aided by visual feedback with a manometer device. The test was repeated using femoral venous injections. RESULTS: Sixty five patients were enrolled, mean age 52, 43% male. TCD grades were significantly higher with femoral injections compared to brachial injections at rest (p<0.0001), and with the Valsalva maneuver (p<0.0001). The presence of a RLS was confirmed by intracardiac echocardiography (ICE) during cardiac catheterization in 62 (95.4%) patients. CONCLUSION: The sensitivity of TCD for detection of RLS is increased when agitated saline injections are performed through the femoral vein. In patients with a high clinical suspicion for RLS, low TCD grades obtained with traditional brachial venous access should be interpreted with caution. When possible, a repeat study using femoral venous access may be considered.

Heart failure and obesity in adults: pathophysiology, clinical manifestations and management.

Obesity is both a risk factor and a direct cause of heart failure (HF) in adults. Severe obesity produces hemodynamic alterations that predispose to changes in left ventricular morphology and function, which, over time, may lend to the development of HF (obesity cardiomyopathy). Certain neurohormonal and metabolic abnormalities as well as cardiovascular co-morbidities may facilitate this process. Substantial purposeful weight loss is capable of reversing most of the alterations in cardiac performance and morphology and may improve functional capacity and quality of life in patents with obesity cardiomyopathy.

The hematopoietic stem cell expansion niche in fetal liver: Current state of the art and the way forward.

Hematopoietic development goes through a number of embryonic sites that host hematopoietic progenitor and stem cells with function required at specific developmental stages. Among embryonic sites, the fetal liver (FL) hosts definitive hematopoietic stem cells (HSCs) capable of engrafting adult hematopoietic system and supports their rapid expansion. Hence, this site provides an excellent model to understand the cellular and molecular components of the machinery involved in HSC-proliferative events, leading to their overall expansion. It has been unequivocally established that extrinsic regulators orchestrate events that maintain HSC function. Although most studies on extrinsic regulation of HSC function are targeted at adult bone marrow (BM) hematopoiesis, little is known about how FL HSC function is regulated by their microniche. This review provides the current state of our understanding on molecular and cellular niche factors that support FL hematopoiesis.

Abnormal sympathetic nerve activity in women exposed to cigarette smoke: a potential mechanism to explain increased cardiac risk.

In women, cardiac deaths attributable to tobacco exposure have reached the same high levels as men. Normally, sympathetic nerve activity (SNA) fluctuates according to the menstrual phase, but in habitual smokers, SNA levels remain constant. Our purpose is to extend these observations to other groups of women exposed to tobacco smoke and to explore potential mechanisms. We hypothesize that women exposed to secondhand smoke, but not former smokers, have nonfluctuating SNA compared with never smokers, and that impaired baroreflex suppression of SNA, and/or heightened central SNA responses, underlie this nonfluctuating SNA. We also hypothesize that female smokers have impaired nocturnal blood pressure dipping, normally mediated by modulation of SNA. In 49 females (19 never, 12 current, 9 former, 9 passive smokers), SNA was recorded (microneurography) during high- and low-hormone ovarian phases at rest, during pharmacological baroreflex testing, and during the cold pressor test (CPT). Twenty-four hour blood pressure (BP) monitoring was performed. Current and passive smokers, but not former smokers, had a nonfluctuating pattern of SNA, unlike never smokers in whom SNA varied with the menstrual phase. Baroreflex control of SNA was significantly blunted in current smokers, independent of menstrual phase. In passive smokers, SNA response to CPT was markedly increased. Nondipping was unexpectedly high in all groups. SNA does not vary during the menstrual cycle in active and passive smokers, unlike never and former smokers. Baroreflex control of SNA is blunted in current smokers, whereas SNA response to CPT is heightened in passive smokers. Smoking cessation is associated with return of the altered SNA pattern to normal.

Incidence of patent foramen ovale and migraine headache in adults with congenital heart disease with no known cardiac shunts.

The purpose of this study was to understand why patients with adult congenital heart disease (CHD) but no obvious shunt have an increased frequency of migraine headaches (MH). CHD patients with no known cardiac shunts (CHD-NKS), based on their echocardiographic or angiographic procedures, were tested for a right-to-left shunt using agitated saline contrast transcranial Doppler (TCD). Medical records of 2,920 patients from the UCLA Adult CHD Center were screened to participate in a study to evaluate the prevalence of MH in adults with CHD; 182 patients (6.23%) had CHD-NKS; of these, 60 (30%) underwent a TCD; 23 (38%) tested positive and 37 (62%) tested negative for a right-to-left shunt (P = 0.01 compared with controls). The frequency of MH was 43% in CHD-NKS compared with 11% in controls (P < 0.0001). TCD demonstrated right-to-left shunting in approximately 2/3 of patients with pulmonary stenosis, the Marfan syndrome and congenitally corrected transposition of great vessels, 1/4 of patients with bicuspid aortic valve, 1/5 of patients with mitral valve prolapse and all patients with Ebstein's anomaly. Approximately half of these experienced MH. Patients who had MH did not show a higher frequency of right-to-left shunt when compared with patients without MH (P = 0.57). In conclusion, CHD patients with conditions usually not associated with a shunt have a higher than expected prevalence of PFO which permits intermittent right-to-left shunting undetected by standard non-contrast TTE and TEE; the increased prevalence of right-to-left shunting may partially explain the higher than expected frequency of migraines.

Coronary steal syndrome caused by a large saphenous venous graft aneurysm with a fistula communicating to the right atrium managed by transcatheter closure.

A 71-year-old man with history of coronary artery disease status post coronary artery bypass grafting (CABG) in 1999 (left internal mammary artery-left anterior descending, saphenous venous graft [SVG]-diagonal, and SVG-right coronary artery [RCA], ascending aorta aneurysm [4.8 cm], infrarenal aorta aortic aneurysm status post endovascular aortic repair, heart failure with reduced ejection fraction of 25% status post cardiac resynchronization therapy-defibrillator) presented with decompensated heart failure. He was in monomorphic ventricular tachycardia; he was cardioverted and started on amiodarone and lidocaine. His vital signs remained stable.

Thrombectomy using AlphaVac for left atrial thrombus causing mechanical mitral valve obstruction and cardiogenic shock.

We present a 73-year-old female with history of rheumatic heart disease status post-mechanical mitral valve on warfarin, valvular atrial fibrillation, and alpha thalassemia who was admitted to an outside hospital with anterior ST-segment myocardial infarction. Coronary angiogram showed occluded left anterior descending artery (LAD) with acute thrombus status post-thrombectomy and balloon angioplasty.

Prospective Randomized Control Trial to Compare the Role of Injection Cerebrolysin for 10 Days Duration Against Placebo in Operated Cases of Degenerative Cervical Myelopathy.

STUDY DESIGN: Prospective randomized control trial. OBJECTIVE: To analyze outcomes following the injection of cerebrolysin in surgically treated patients with degenerative cervical myelopathy (DCM). SUMMARY OF BACKGROUND DATA: Previous research has concluded that superior functional outcomes are achieved with the use of cerebrolysin in surgically treated patients of DCM for 21 days. Our study has been conducted to analyze the use of this drug for a shorter duration (10 days) and compare its clinical efficacy. METHODS: Ninety operated cases of mild to severe DCM were randomized into two groups. Sixty patients received the injection Cerebrolysin for 10 days postoperatively. The remaining 30 patients received a placebo. Functional outcomes were measured using modified Japanese Orthopaedic Association (mJOA) scores and visual analogue scale (VAS). The American Spinal Injury Association (ASIA) scale was used to document neurological recovery. Hand function was assessed by measuring the grip strength and the upper limb function score the upper extremity motor mJOA plus upper extremity sensory mJOA score. Assessments were performed and preoperatively and postoperatively and at one-month, three-month, six-month, and one-year following surgery. RESULTS: Preoperative mJOA and VAS scores were comparable in both groups ( P >0.05). Both groups experienced an improvement in mJOA and VAS scores at all time-points during follow-up as compared with preoperative scores. However, the cerebrolysin group demonstrated significantly greater mJOA scores (16.37±1) when compared with the placebo (15.2±1.8) at one-year follow-up ( P <0.0001). Neurological improvement with cerebrolysin therapy was also superior ( P =0.04). No significant adverse reactions were documented. CONCLUSION: Injection cerebrolysin, when administered for 10 days postoperatively, can result in significantly greater neurological improvement and hand function in patients with DCM who also receive surgery.

Long-segment fixation versus short-segment fixation with instrumentation of index vertebra for thoracolumbar fractures.

Background: We assessed and analyzed the clinical, perioperative, functional, and radiological outcomes of long- versus short-segment (SS) fixation of thoracolumbar spine fractures that included the index vertebra. Methods: We retrospectively evaluated 119 patients with thoracolumbar spine fractures (i.e., using AO classification system). The patient was followed up for a minimum of 1 year at which time the angles of correction were measured on lateral X-rays (i.e., using Cobb's method). Neurological grading employed the Frankel's grading system. Operative time, perioperative blood loss, and time to mobilization were also analyzed. Results: After 1 year, the loss of kyphosis was not significantly different between the two groups. Although there were no statistical differences in terms, regarding neurological outcomes, time to mobilization, or duration of hospitalization, the operative times and perioperative blood loss were significantly reduced in patients undergoing SS fixation. Conclusion: We determined the efficacy of SS fixation for thoracolumbar fractures including the index vertebra.

Long-term operative outcome of giant calcified thoracic disc herniation - A retrospective analysis of 24 patients.

Background: Thoracic disc herniations (TDHs) are rare (0.15-4%) and often cause significant myelopathy (70-95%). They are defined as "Giant" if they occupy >40% of the spinal canal. Further, they are ossified/calcified in 42% of cases, with a 70% incidence of intradural extension. Here, we reviewed our experience resecting 24 giant thoracic discs utilizing a posterolateral surgical approach. Methods: Over a 2-year period, we evaluated the outcomes for 24 patients averaging 40 years of age undergoing posterolateral resections of giant ossified/calcified TDH. We evaluated multiple clinical and radiographic parameters; demographics, Frankel grades, surgical time, perioperative complications, and number of levels involved. In addition, utilizing magnetic resonance/computed tomography studies, we documented that the most commonly involved level was T11-T12, and the average canal occupancy ratio (i.e., degree of canal encroachment) was 58.2 ± 7.72%. Results: Neurological improvement was seen in 22 of the 24 patients; none experienced neurological deterioration over the average 2-year post-operative period. Six complications occurred; three dural tears and three suture site infections. Conclusion: The posterolateral approach proved to be safe and effectively for resecting 24 giant ossified/calcified TDH with minimum complications.

Unilateral facet cyst at the atlantoaxial joint leading to cervical myelopathy: A case report and review of literature.

Background: Spinal synovial cysts are rare in the cervical spine where they may cause myeloradiculopathy. Contrast MR studies help differentiate these from other lesions. The optimal treatment is often surgical removal. Case Description: A 47-year-old male presented with axial neck pain, numbness, and left-hand paresthesia. When the MR study showed dorsolateral cord compression due to a left-sided C1-C2 facet cyst, he underwent a unilateral decompression/fusion. Adequate cyst removal/excision was documented on a postoperative MR performed 2 weeks and 3 months postoperatively. Conclusion: A 47-year-old male presented with myelopathy attributed to an MR-documented dorsolateral C1/ C2 facet cyst. Following excision/decompression of the cyst and posterior fusion, the patient's symptoms/signs resolved.