Personal career decisions during medical training are not complicated, they are complex.

BACKGROUND: For medical training to be deemed successful, in addition to gaining the skills required to make appropriate clinical decisions, trainees must learn how to make good personal decisions. These decisions may affect satisfaction with career choice, work-life balance, and their ability to maintain/improve clinical performance over time-outcomes that can impact future wellness. Here, the authors introduce a decision-making framework with the goal of improving our understanding of personal decisions. METHODS: Stemming from the business world, the Cynefin framework describes five decision-making domains: clear, complicated, complex, chaotic, and confusion, and a key inference of this framework is that decision-making can be improved by first identifying the decision-making domain. Personal decisions are largely complex-so applying linear decision-making strategies is unlikely to help in this domain. RESULTS: The available data suggest that the outcomes of personal decisions are suboptimal, and the authors propose three mechanisms to explain these findings: (1) Complex decision is susceptible to attribute substitution where we subconsciously trade these decisions for easier decisions; (2) predictions are prone to cognitive biases, such as assuming our situation will remain constant (linear projection fallacy), believing that accomplishing a goal will deliver lasting happiness (arrival bias), or overestimating benefits and underestimating costs of future tasks (planning fallacy); and (3) complex decisions have an inherently higher failure rate than complicated decisions because they are the result of an ongoing, dynamic person-by-situation interaction and, as such, have more time to fail and more ways to do so. DISCUSSION: Based upon their view that personal decisions are complex, the authors propose strategies to improve satisfaction with personal decisions, including increasing awareness of biases that may impact personal decisions. Recognising that the outcome of personal decisions can change over time, they also suggest additional interventions to manage these decisions, such as different forms of mentoring.

Why we should view the decision of medical trainees to cheat as the product of a person-by-situation interaction.

BACKGROUND: Cheating during medical training is a delicate subject matter with varying opinions on the prevalence, causes and gravity of cheating during training. PROPOSED FRAMEWORK: In this article, the authors suggest that the decision to cheat is best viewed as the product of a person-by-situation interaction rather than indicating inherent dishonesty and/or extrinsic motivation in those who participate in cheating. This framework can explain why individuals who would typically default to honesty may participate in cheating if there is perceived justification for cheating and where situational variables, such as ease of cheating, rewards for cheating and perceived risk associated with cheating, make the decision to cheat appear rational. DISCUSSION: They discuss why the impression that there is a culture of cheating can provide perceived justification for medical trainees to cheat if they have the opportunity. They then describe how aspects of medical training and assessment may enable or hinder cheating by trainees. Consistent with the person-by-situation interaction framework, they contend that our response to cheating should include interventions directed at both the person who cheated and situational variables that enabled cheating. Recognising that some forms of cheating may be widespread, difficult to detect and contentious (such as the creation and use of exam reconstructs), their proposal for dealing with suspected and pervasive cheating is to identify and target enabling variables such that the decision to cheat becomes less rational. Their hope is that in so doing, we can gradually nudge trainees and the culture of medical training towards honesty.

Mitigating diagnostic performance bias in a skin-tone balanced dermatology curriculum.

INTRODUCTION: Individuals with skin of colour (SoC) have delayed diagnosis and poorer outcomes when presenting with some dermatologic conditions when compared to individuals with light skin (LS). The objective of this study was to determine if diagnostic performance bias can be mitigated by a skin-tone balanced dermatology curriculum. METHODOLOGY: A prospective randomised intervention study occurred over 2 weeks in 2020 at a Canadian medical school. A convenience sample of all first-year medical students (n = 167) was chosen. In week 1, all participants had access to dermatology podcasts and were randomly allocated to receive non-analytic training (NAT; online patient 'cards') on either SoC cases or LS cases. In week 2, all participants received combined training (CT; NAT and analytic training through workshops on how to apply dermatology diagnostic rules for all skin tones). Participating students completed two formative assessments after weeks 1 and 2. RESULTS: Ninety-two students participated in the study. After week 1, both groups had a lower diagnostic performance on SoC (p = 0.0002 and p = 0.002 for students who trained on LS 'cards' and SoC 'cards', respectively). There was a significant decrease in mean skin tone difference in both groups after week 2 (initial training on SoC: 5.8% (SD 12.2) pre, -1.4% (14.7) post, p = 0.007; initial training on LS: 7.8% (15.4) pre, -4.0% (11.8%) post, p = 0.0001). Five students participated in a post-study survey in 2023, and all found the curriculum enhanced their diagnostic skills in SoC. CONCLUSIONS: SoC performance biases of medical students disappeared after CT in a skin tone-balanced dermatology curriculum.

Development and validation of echocardiography-based machine-learning models to predict mortality.

BACKGROUND: Echocardiography (echo) based machine learning (ML) models may be useful in identifying patients at high-risk of all-cause mortality. METHODS: We developed ML models (ResNet deep learning using echo videos and CatBoost gradient boosting using echo measurements) to predict 1-year, 3-year, and 5-year mortality. Models were trained on the Mackay dataset, Taiwan (6083 echos, 3626 patients) and validated in the Alberta HEART dataset, Canada (997 echos, 595 patients). We examined the performance of the models overall, and in subgroups (healthy controls, at risk of heart failure (HF), HF with reduced ejection fraction (HFrEF) and HF with preserved ejection fraction (HFpEF)). We compared the models' performance to the MAGGIC risk score, and examined the correlation between the models' predicted probability of death and baseline quality of life as measured by the Kansas City Cardiomyopathy Questionnaire (KCCQ). FINDINGS: Mortality rates at 1-, 3- and 5-years were 14.9%, 28.6%, and 42.5% in the Mackay cohort, and 3.0%, 10.3%, and 18.7%, in the Alberta HEART cohort. The ResNet and CatBoost models achieved area under the receiver-operating curve (AUROC) between 85% and 92% in internal validation. In external validation, the AUROCs for the ResNet (82%, 82%, and 78%) were significantly better than CatBoost (78%, 73%, and 75%), for 1-, 3- and 5-year mortality prediction respectively, with better or comparable performance to the MAGGIC score. ResNet models predicted higher probability of death in the HFpEF and HFrEF (30%-50%) subgroups than in controls and at risk patients (5%-20%). The predicted probabilities of death correlated with KCCQ scores (all p < 0.05). INTERPRETATION: Echo-based ML models to predict mortality had good internal and external validity, were generalizable, correlated with patients' quality of life, and are comparable to an established HF risk score. These models can be leveraged for automated risk stratification at point-of-care. FUNDING: Funding for Alberta HEART was provided by an Alberta Innovates - Health Solutions Interdisciplinary Team Grant no. AHFMRITG 200801018. P.K. holds a Canadian Institutes of Health Research (CIHR) Sex and Gender Science Chair and a Heart & Stroke Foundation Chair in Cardiovascular Research. A.V. and V.S. received funding from the Mitacs Globalink Research Internship.

Lack of Equity in the Cardiology Physician Workforce: A Narrative Review and Analysis of the Literature.

The gender and racial diversity in the cardiology workforce in Canada does not reflect that of the population we serve. As social awareness of the principles of equity, diversity, and inclusion rises, our profession must rise to meet the challenges they present. We detail contemporary examples of publication bias in the cardiac sciences literature and describe the factors that led to oversight in the peer-review process. We performed a narrative review to summarize the published literature on equity and diversity among cardiac physicians. We also summarize the challenges faced by women and racial-minority physicians when pursuing and thriving in a career in cardiology, and the systemic barriers to their success. In the past decade, social justice movements have advanced. Professionalism standards are changing, and awareness and understanding of these advances in terminology is imperative for all physicians. In this review, we summarize key language and concepts, with cardiology-specific examples, and propose a new paradigm of professionalism.

Au Canada, la diversité des genres et des races au sein de la main-d'œuvre en cardiologie ne reflète pas celle qui existe dans la population que nous servons. La prise de conscience sociale des principes d'équité, de diversité et d'inclusion gagne du terrain, et notre profession doit se montrer à la hauteur des défis qui s'y rattachent. Nous abordons des exemples contemporains de biais de publication dans la littérature cardiologique et décrivons les facteurs qui ont mené à des omissions dans le processus d'examen par les pairs. Une revue narrative de la littérature publiée sur l'équité et la diversité parmi les cardiologues nous a permis de résumer l'information publiée sur le sujet. Nous résumons également les difficultés auxquelles sont confrontés les femmes et les médecins issus des minorités raciales qui choisissent et mènent avec brio une carrière en cardiologie, de même que les obstacles systémiques à leur réussite. Au cours de la dernière décennie, les mouvements de justice sociale ont progressé. Les normes de professionnalisme évoluent, et tous les médecins doivent connaître et comprendre les avancées terminologiques. Dans le présent article, nous résumons les termes et les concepts clés, en y adjoignant des exemples propres au domaine de la cardiologie. Nous proposons aussi un nouveau paradigme de professionnalisme.

Statin Induced Regression of Cardiomyopathy Trial: A Randomized, Placebo-controlled Double-blind Trial.

BACKGROUND: Hypertrophic cardiomyopathy (HCM), characterized by a thickened, fibrotic myocardium, remains the most common cause of sudden cardiac death in young adults. Based on animal and clinical data, we hypothesized that atorvastatin would induce left ventricular (LV) mass regression. METHODS: Statin Induced Regression of Cardiomyopathy Trial (SIRCAT) was a randomized, placebo-controlled study. The primary endpoint was change in LV mass measured by cardiac magnetic resonance imaging 12 months after treatment with once-daily atorvastatin 80 mg or placebo. A key secondary endpoint was diastolic dysfunction measured echocardiographically by transmitral flow velocities. SIRCAT is registered with www.clinicaltrials.gov (NCT00317967). RESULTS: Of 222 screened patients, 22 were randomized evenly to atorvastatin and placebo. The mean age was 47 ± 10 years, and 15 (68%) were male. All subjects completed the protocol. At baseline, LV masses were 197 ± 76 g and 205 ± 82 g in the placebo and atorvastatin groups, respectively. After 12 months treatment, the LV masses in the placebo and atorvastatin groups were 196 ± 80 versus 206 ± 92 g (P = 0.80), respectively. Echocardiographic indices were not different in the two groups at baseline. After 12 months, diastolic dysfunction as assessed using transmitral flow velocities E/E', A/A', and peak systolic mitral velocity showed no benefit from atorvastatin. CONCLUSIONS: In patients with HCM, atorvastatin did not cause LV mass regression or improvements in LV diastolic function.

Phenotypic analysis of arrhythmogenic cardiomyopathy in the Hutterite population: role of electrocardiogram in identifying high-risk desmocollin-2 carriers.

BACKGROUND: The p.Gln554X mutation in desmocollin-2 (DSC2) is prevalent in ≈10% of the Hutterite population. While the homozygous mutation causes severe biventricular arrhythmogenic right ventricular cardiomyopathy, the phenotypic features and prognosis of heterozygotes remain incompletely understood. METHODS AND RESULTS: Eleven homozygotes (mean age 32±8 years, 45% female), 28 heterozygotes (mean age 40±15 years, 50% female), and 22 mutation-negatives (mean age 43±17 years, 41% female) were examined. Diagnostic testing was performed as per the arrhythmogenic right ventricular cardiomyopathy modified Task Force Criteria. Inverted T waves in the right precordial leads on ECG were seen in all homozygotes but not in their counterparts (P<0.001). Homozygotes had higher median daily premature ventricular complex burden than did heterozygotes or mutation-negatives (1407 [IQR 1080 to 2936] versus 2 [IQR 0 to 6] versus 6 [IQR 0 to 214], P=0.0002). Ventricular tachycardia was observed in 60% of homozygotes but in none of the remaining individuals (P<0.001). On cardiac magnetic resonance imaging, homozygotes had significantly larger indexed end-diastolic volumes (right ventricular: 122±24 versus 83±17 versus 83±12 mL/m(2), P<0.0001; left ventricular: 93±18 versus 76±13 versus 80±11 mL/m(2), P=0.0124) and lower ejection fraction values compared with heterozygotes and mutation-negatives (right ventricular ejection fraction: 41±9% versus 59±9% versus 61±6%, P<0.0001; left ventricular ejection fraction: 53±8% versus 65±5% versus 64±5%, P<0.0001). Most affected individuals lacked right ventricular wall motion abnormalities. Thus, few met cardiac magnetic resonance imaging task force criteria. CONCLUSIONS: The ECG reliably identifies homozygous p.Gln554X carriers and may be useful as an initial step in the screening of high-risk Hutterites. The cardiac phenotype of heterozygotes appears benign, but further prospective follow-up of their arrhythmic risk is needed.

Accuracy and reproducibility of semi-automated late gadolinium enhancement quantification techniques in patients with hypertrophic cardiomyopathy.

BACKGROUND: The presence and extent of late gadolinium enhancement (LGE) has been associated with adverse events in patients with hypertrophic cardiomyopathy (HCM). Signal intensity (SI) threshold techniques are routinely employed for quantification; Full-Width at Half-Maximum (FWHM) techniques are suggested to provide greater reproducibility than Signal Threshold versus Reference Mean (STRM) techniques, however the accuracy of these approaches versus the manual assignment of optimal SI thresholds has not been studied. In this study, we compared all known semi-automated LGE quantification techniques for accuracy and reproducibility among patients with HCM. METHODS: Seventy-six HCM patients (51 male, age 54 ± 13 years) were studied. Total LGE volume was quantified using 7 semi-automated techniques and compared to expert manual adjustment of the SI threshold to achieve optimal segmentation. Techniques tested included STRM based thresholds of >2, 3, 4, 5 and 6 SD above mean SI of reference myocardium, the FWHM technique, and the Otsu-auto-threshold (OAT) technique. The SI threshold chosen by each technique was recorded for all slices. Bland-Altman analysis and intra-class correlation coefficients (ICC) were reported for each semi-automated technique versus expert, manually adjusted LGE segmentation. Intra- and inter-observer reproducibility assessments were also performed. RESULTS: Fifty-two of 76 (68%) patients showed LGE on a total of 202 slices. For accuracy, the STRM >3SD technique showed the greatest agreement with manual segmentation (ICC = 0.97, mean difference and 95% limits of agreement = 1.6 ± 10.7 g) while STRM >6SD, >5SD, 4SD and FWHM techniques systematically underestimated total LGE volume. Slice based analysis of selected SI thresholds similarly showed the STRM >3SD threshold to most closely approximate manually adjusted SI thresholds (ICC = 0.88). For reproducibility, the intra- and inter-observer reproducibility of the >3SD threshold demonstrated an acceptable mean difference and 95% limits of agreement of -0.5 ± 6.8 g and -0.9 ± 5.6 g, respectively. CONCLUSIONS: FWHM segmentation provides superior reproducibility, however systematically underestimates total LGE volume compared to manual segmentation in patients with HCM. The STRM >3SD technique provides the greatest accuracy while retaining acceptable reproducibility and may therefore be a preferred approach for LGE quantification in this population.

The Alberta Heart Failure Etiology and Analysis Research Team (HEART) study.

BACKGROUND: Nationally, symptomatic heart failure affects 1.5-2% of Canadians, incurs $3 billion in hospital costs annually and the global burden is expected to double in the next 1-2 decades. The current one-year mortality rate after diagnosis of heart failure remains high at >25%. Consequently, new therapeutic strategies need to be developed for this debilitating condition. METHODS/DESIGN: The objective of the Alberta HEART program (http://albertaheartresearch.ca) is to develop novel diagnostic, therapeutic and prognostic approaches to patients with heart failure with preserved ejection fraction. We hypothesize that novel imaging techniques and biomarkers will aid in describing heart failure with preserved ejection fraction. Furthermore, the development of new diagnostic criteria will allow us to: 1) better define risk factors associated with heart failure with preserved ejection fraction; 2) elucidate clinical, cellular and molecular mechanisms involved with the development and progression of heart failure with preserved ejection fraction; 3) design and test new therapeutic strategies for patients with heart failure with preserved ejection fraction. Additionally, Alberta HEART provides training and education for enhancing translational medicine, knowledge translation and clinical practice in heart failure. This is a prospective observational cohort study of patients with, or at risk for, heart failure. Patients will have sequential testing including quality of life and clinical outcomes over 12 months. After that time, study participants will be passively followed via linkage to external administrative databases. Clinical outcomes of interest include death, hospitalization, emergency department visits, physician resource use and/or heart transplant. Patients will be followed for a total of 5 years. DISCUSSION: Alberta HEART has the primary objective to define new diagnostic criteria for patients with heart failure with preserved ejection fraction. New criteria will allow for targeted therapies, diagnostic tests and further understanding of the patients, both at-risk for and with heart failure. TRIAL REGISTRATION: ClinicalTrials.gov NCT02052804.

Acute ischaemic stroke or transient ischaemic attack and the need for inpatient echocardiography.

OBJECTIVES: To determine the diagnostic yield of echocardiography and its utility in changing medical management; and to derive a risk score to guide its use in patients with in-hospital stroke or transient ischaemic attack (TIA). METHODS: We carried out a retrospective chart review from January 2009 to June 2010 of patients with acute ischaemic stroke or TIA who had undergone transthoracic echocardiography (TTE) or transoesophageal echocardiography (TOE). Clinical and imaging findings at baseline were noted and 'potential clinically relevant findings' identified on TTE and TOE. A multivariable logistic regression was used to identify predictors of potential clinically relevant findings on TTE or TOE and derive a risk score. RESULTS: Of 370 patients, 307 (83.0%) had TTE and 63 (17.0%) had additional TOE. Potential clinically relevant findings on echocardiography were noted in 28 (7.6%) patients. Change in medical management was noted in 19/307 (6.2%) patients on TTE and in 7/63 (11.1%) patients on TOE. Male sex (OR 3.05, 95% CI 1.19 to 7.84; p=0.021), abnormal admission ECG (OR 4.39, 95% CI 1.79 to 10.79; p=0.001), and embolic pattern imaging at baseline (OR 2.38, 95% CI 1.05 to 5.40; p=0.038) were independent predictors of findings on TTE or TOE. A risk score including these three variables had modest discrimination (c-statistic 0.69, 95% CI 0.59 to 0.80). CONCLUSIONS: Echocardiography detected potential clinically relevant findings in a minority of patients (7.6%), but these findings changed medical management 90.5% of the time. A risk score using sex, ECG abnormality, and embolic pattern imaging at baseline could help predict which patients are more likely to have these echo findings.

Medical educators' perspectives of teaching physical examinations using ultrasonography at the undergraduate level.

BACKGROUND: Ultrasonography is increasingly used for teaching physical examination in medical schools. This study seeks the opinions of educators as to which physical examinations would be most enhanced by the addition of ultrasonography. We also asked when ultrasound-aided physical examination teaching could have deleterious effects if used outside its intended scope. METHODS: All of the educators from the University of Calgary Master Teacher Program were invited to complete a 22-item paper-based survey. Survey items were generated independently by two investigators, with input from an expert panel (n = 5). RESULTS: Of the 36 educators, 27 (75%) completed the survey. Examinations identified to be potentially most useful included: measuring the size of the abdominal aorta, identifying the presence/absence of ascites, identifying the presence/absence of pleural effusions, and measuring the size of the bladder. Examinations thought to be potentially most harmful included: identifying the presence/absence of intrauterine pregnancy, measuring the size of the abdominal aorta, and identifying the presence/absence of pericardial effusion. CONCLUSIONS: Examinations that are potentially the most useful may also be potentially the most harmful. When initiating an ultrasound curriculum for physical examinations, educators should weigh the risks and benefits of examinations chosen.

Secondhand smoke exposure and quality of life in patients with heart failure.

BACKGROUND: Secondhand smoke (SHS) exposure is associated with an increased risk of atherosclerotic heart disease and cardiac events. We sought to assess the effect of SHS on health-related quality of life (HRQOL) in patients with heart failure. METHODS: Current nonsmokers with heart failure (N = 205) were enrolled in a cohort study. Exposure to SHS was assessed with a validated exposure questionnaire and a high-sensitivity assay for urinary cotinine level. Multidimensional HRQOL was evaluated with the RAND 36-Item Short Form Health Survey, which assesses 8 domains on a scale of 0 (worst) to 100 (best): physical functioning, bodily pain, role limitations due to physical health problems (role physical), role limitations due to emotional/personal problems (role emotional), emotional well-being, social functioning, energy/fatigue, and general health perceptions. A subset of patients (n = 75) agreed to assessment of functional status with a 6-minute walk test. RESULTS: Self-reported exposure to SHS was associated with generally lower HRQOL scores in univariate analysis, with statistically and clinically significant reductions in 3 subscale scores: role physical (22.2 points), emotional well-being (11.0 points), and role emotional (16.2 points). Even after adjustment for clinical factors, such as age, sex, New York Heart Association class of heart failure, comorbidities, and medications, exposure to SHS remained an independent predictor of HRQOL scores in these domains. When increasing quartiles of urinary cotinine level were used as the exposure measure, qualitatively similar results were obtained. CONCLUSIONS: Even low levels of SHS are associated with lower scores in several aspects of HRQOL. Physicians should advise patients with heart failure and their families to avoid SHS exposure.

Pulmonary vein stenosis following left pneumonectomy: a variant contributor to postpneumonectomy syndrome.

Postpneumonectomy syndrome is a recognized complication following pneumonectomy, resulting from mediastinal displacement into the vacated pleural space. Mediastinal displacement causes bronchial compression and dyspnea. This report describes a 47-year-old woman who presented with shortness of breath 6 months after a left pneumonectomy. She was initially hypoxic and was found to have a patent foramen ovale. Following closure of the patent foramen ovale, she was no longer hypoxic, but she continued to have dyspnea with exertion and left lateral decubitus positioning. There was no evidence of bronchial compression, but MRI and transesophageal echocardiography suggested pulmonary vein compression due to mediastinal displacement. Transthoracic echocardiography confirmed functional pulmonary vein compression that was worse in the standing and in the left lateral positions. Her symptoms improved with mediastinal repositioning using a transesophageal echocardiography-guided approach. Positional pulmonary vein compression may be an underdiagnosed complication of pneumonectomy.

Echocardiographic predictors of change in left ventricular diastolic pressure in heart failure patients receiving nesiritide.

BACKGROUND: To evaluate the usefulness of currently accepted echocardiographic parameters of diastolic function to assess the acute change in left ventricular end-diastolic pressure (LVEDP) following the administration of nesiritide in a heart failure population. METHODS: In 25 heart failure patients (15 with systolic dysfunction, 10 with preserved ejection fraction [EF]), Doppler echocardiography, right and left heart catheterization, and invasive biventricular pressure hemodynamics were obtained at baseline and 30 minutes after nesiritide infusion. RESULTS: Twenty-four patients had sufficient echocardiographic images for analysis. The mean age was 60 +/- 11 years, 48% were male, 56% had coronary artery disease, and 64% had hypertension. Right ventricular systolic pressure (RVSP) had the highest correlation with LV filling pressure: pulmonary capillary wedge pressure (PCWP), pre-A wave LV, and LVEDP (r = 0.66, P = 0.0009; r = 0.63, P = 0.002; r = 0.72, P = 0.0002, respectively). Following nesiritide administration, the mean PCWP decreased from 17.1 +/- 7.8 mmHg at baseline to 9.6 +/- 6.2 mmHg (P < 0.001). Change in RVSP had the highest correlation with change in PCWP (r =-0.67, P = 0.10) and change in LVEDP (r =-0.71, P = 0.07). CONCLUSION: Echocardiographic parameters are frequently assessed in attempts to estimate left heart diastolic pressures. In heart failure patients, RVSP appears to be the best predictor of LVEDP, outperforming tissue Doppler E/E'. RVSP was found to be the best echocardiographic predictor of change in LV filling pressure with intravenous vasodilator therapy in heart failure patients. RVSP may provide a noninvasive means of assessing response to cardiac therapy.