Publications

2023

Suen, Leslie W, Eric Vittinghoff, Alan H B Wu, Akshay Ravi, Phillip O Coffin, Priscilla Hsue, Kara L Lynch, Dhruv S Kazi, and Elise D Riley. (2023) 2023. “Multiple Substance Use and Blood Pressure in Women Experiencing Homelessness.”. Addictive Behaviors Reports 17: 100483. https://doi.org/10.1016/j.abrep.2023.100483.

BACKGROUND: Substance use increases risk of cardiovascular events, particularly among women with additional risk factors like housing instability. While multiple substance use is common among unstably housed individuals, relationships between multiple substance use and cardiovascular risk factors like blood pressure are not well characterized.

METHODS: We conducted a cohort study between 2016 and 2019 to examine associations between multiple substance use and blood pressure in women experiencing homelessness and unstable housing. Participants completed six monthly visits including vital sign assessment, interview, and blood draw to assess toxicology-confirmed substance use (e.g., cocaine, alcohol, opioids) and cardiovascular health. We used linear mixed models to evaluate the outcomes of systolic and diastolic blood pressure (SBP; DBP).

RESULTS: Mean age was 51.6 years; 74 % were women of color. Prevalence of any substance use was 85 %; 63 % of participants used at least two substances at baseline. Adjusting for race, body mass index and cholesterol, cocaine was the only substance significantly associated with SBP (4.71 mmHg higher; 95 % CI 1.68, 7.74) and DBP (2.83 mmHg higher; 95 % CI 0.72, 4.94). Further analysis found no differences in SBP or DBP between those with concurrent use of other stimulants, depressants, or both with cocaine, compared to those who used cocaine only.

CONCLUSIONS: Cocaine was the only substance associated with higher SBP and DBP, even after accounting for simultaneous use of other substances. Along with interventions to address cocaine use, stimulant use screening during cardiovascular risk assessment and intensive blood pressure management may improve cardiovascular outcomes among women experiencing housing instability.

Kazi, Dhruv S, Colette DeJong, Randi Chen, Rishi K Wadhera, and Chien-Wen Tseng. (2023) 2023. “The Inflation Reduction Act and Out-of-Pocket Drug Costs for Medicare Beneficiaries With Cardiovascular Disease.”. Journal of the American College of Cardiology 81 (21): 2103-11. https://doi.org/10.1016/j.jacc.2023.03.414.

BACKGROUND: High out-of-pocket costs can impede access to guideline-directed cardiovascular drugs. The 2022 Inflation Reduction Act (IRA) will eliminate catastrophic coinsurance and cap annual out-of-pocket costs for Medicare Part D patients by 2025.

OBJECTIVES: This study sought to estimate the IRA's impact on out-of-pocket costs for Part D beneficiaries with cardiovascular disease.

METHODS: The investigators chose 4 cardiovascular conditions that frequently require high-cost guideline-recommended drugs: severe hypercholesterolemia; heart failure with reduced ejection fraction (HFrEF); HFrEF with atrial fibrillation (AF); and cardiac transthyretin amyloidosis. This study included 4,137 Part D plans nationwide and compared projected annual out-of-pocket drug costs for each condition in 2022 (baseline), 2023 (rollout), 2024 (5% catastrophic coinsurance eliminated), and 2025 ($2,000 cap on out-of-pocket costs).

RESULTS: In 2022, mean projected annual out-of-pocket costs were $1,629 for severe hypercholesterolemia, $2,758 for HFrEF, $3,259 for HFrEF with AF, and $14,978 for amyloidosis. In 2023, the initial IRA rollout will not significantly change out-of-pocket costs for the 4 conditions. In 2024, elimination of 5% catastrophic coinsurance will lower out-of-pocket costs for the 2 costliest conditions: HFrEF with AF ($2,855, 12% reduction) and amyloidosis ($3,468, 77% reduction). By 2025, the $2,000 cap will lower out-of-pocket costs for all 4 conditions to $1,491 for hypercholesterolemia (8% reduction), $1,954 for HFrEF (29% reduction), $2,000 for HFrEF with AF (39% reduction), and $2,000 for cardiac transthyretin amyloidosis (87% reduction).

CONCLUSIONS: The IRA will reduce Medicare beneficiaries' out-of-pocket drug costs for the selected cardiovascular conditions by 8% to 87%. Future studies should assess the IRA's impact on adherence to guideline-directed cardiovascular therapies and health outcomes.

Oseran, Andrew S, Yang Song, Jiaman Xu, Issa J Dahabreh, Rishi K Wadhera, James A de Lemos, Sandeep R Das, Tianyu Sun, Robert W Yeh, and Dhruv S Kazi. (2023) 2023. “Long Term Risk of Death and Readmission After Hospital Admission With Covid-19 Among Older Adults: Retrospective Cohort Study.”. BMJ (Clinical Research Ed.) 382: e076222. https://doi.org/10.1136/bmj-2023-076222.

OBJECTIVES: To characterize the long term risk of death and hospital readmission after an index admission with covid-19 among Medicare fee-for-service beneficiaries, and to compare these outcomes with historical control patients admitted to hospital with influenza.

DESIGN: Retrospective cohort study.

SETTING: United States.

PARTICIPANTS: 883 394 Medicare fee-for-service beneficiaries age ≥65 years discharged alive after an index hospital admission with covid-19 between 1 March 2020 and 31 August 2022, compared with 56 409 historical controls discharged alive after a hospital admission with influenza between 1 March 2018 and 31 August 2019. Weighting methods were used to account for differences in observed characteristics.

MAIN OUTCOME MEASURES: All cause death within 180 days of discharge. Secondary outcomes included first all cause readmission and a composite of death or readmission within 180 days.

RESULTS: The covid-19 cohort compared with the influenza cohort was younger (77.9 v 78.9 years, standardized mean difference -0.12) and had a lower proportion of women (51.7% v 57.3%, -0.11). Both groups had a similar proportion of black beneficiaries (10.3% v 8.1%, 0.07) and beneficiaries with dual Medicaid-Medicare eligibility status (20.1% v 19.2%; 0.02). The covid-19 cohort had a lower comorbidity burden, including atrial fibrillation (24.3% v 29.5%, -0.12), heart failure (43.4% v 49.9%, -0.13), and chronic obstructive pulmonary disease (39.2% v 52.9%, -0.27). After weighting, the covid-19 cohort had a higher risk (ie, cumulative incidence) of all cause death at 30 days (10.9% v 3.9%; standardized risk difference 7.0%, 95% confidence interval 6.8% to 7.2%), 90 days (15.5% v 7.1%; 8.4%, 8.2% to 8.7%), and 180 days (19.1% v 10.5%; 8.6%, 8.3% to 8.9%) compared with the influenza cohort. The covid-19 cohort also experienced a higher risk of hospital readmission at 30 days (16.0% v 11.2%; 4.9%, 4.6% to 5.1%) and 90 days (24.1% v 21.3%; 2.8%, 2.5% to 3.2%) but a similar risk at 180 days (30.6% v 30.6%;-0.1%, -0.5% to 0.3%). Over the study period, the 30 day risk of death for patients discharged after a covid-19 admission decreased from 17.9% to 7.2%.

CONCLUSIONS: Medicare beneficiaries who were discharged alive after a covid-19 hospital admission had a higher post-discharge risk of death compared with historical influenza controls; this difference, however, was concentrated in the early post-discharge period. The risk of death for patients discharged after a covid-19 related hospital admission substantially declined over the course of the pandemic.

Virani, Salim S, Kristin Newby, Suzanne Arnold V, Vera Bittner, LaPrincess C Brewer, Susan Halli Demeter, Dave L Dixon, et al. (2023) 2023. “2023 AHA/ACC/ACCP/ASPC/NLA/PCNA Guideline for the Management of Patients With Chronic Coronary Disease: A Report of the American Heart Association/American College of Cardiology Joint Committee on Clinical Practice Guidelines.”. Circulation 148 (9): e9-e119. https://doi.org/10.1161/CIR.0000000000001168.

AIM: The "2023 AHA/ACC/ACCP/ASPC/NLA/PCNA Guideline for the Management of Patients With Chronic Coronary Disease" provides an update to and consolidates new evidence since the "2012 ACCF/AHA/ACP/AATS/PCNA/SCAI/STS Guideline for the Diagnosis and Management of Patients With Stable Ischemic Heart Disease" and the corresponding "2014 ACC/AHA/AATS/PCNA/SCAI/STS Focused Update of the Guideline for the Diagnosis and Management of Patients With Stable Ischemic Heart Disease."

METHODS: A comprehensive literature search was conducted from September 2021 to May 2022. Clinical studies, systematic reviews and meta-analyses, and other evidence conducted on human participants were identified that were published in English from MEDLINE (through PubMed), EMBASE, the Cochrane Library, Agency for Healthcare Research and Quality, and other selected databases relevant to this guideline.

STRUCTURE: This guideline provides an evidenced-based and patient-centered approach to management of patients with chronic coronary disease, considering social determinants of health and incorporating the principles of shared decision-making and team-based care. Relevant topics include general approaches to treatment decisions, guideline-directed management and therapy to reduce symptoms and future cardiovascular events, decision-making pertaining to revascularization in patients with chronic coronary disease, recommendations for management in special populations, patient follow-up and monitoring, evidence gaps, and areas in need of future research. Where applicable, and based on availability of cost-effectiveness data, cost-value recommendations are also provided for clinicians. Many recommendations from previously published guidelines have been updated with new evidence, and new recommendations have been created when supported by published data.

Members, Writing Committee, Salim S Virani, Kristin Newby, Suzanne Arnold V, Vera Bittner, LaPrincess C Brewer, Susan Halli Demeter, et al. (2023) 2023. “2023 AHA/ACC/ACCP/ASPC/NLA/PCNA Guideline for the Management of Patients With Chronic Coronary Disease: A Report of the American Heart Association/American College of Cardiology Joint Committee on Clinical Practice Guidelines.”. Journal of the American College of Cardiology 82 (9): 833-955. https://doi.org/10.1016/j.jacc.2023.04.003.

AIM: The "2023 AHA/ACC/ACCP/ASPC/NLA/PCNA Guideline for the Management of Patients With Chronic Coronary Disease" provides an update to and consolidates new evidence since the "2012 ACCF/AHA/ACP/AATS/PCNA/SCAI/STS Guideline for the Diagnosis and Management of Patients With Stable Ischemic Heart Disease" and the corresponding "2014 ACC/AHA/AATS/PCNA/SCAI/STS Focused Update of the Guideline for the Diagnosis and Management of Patients With Stable Ischemic Heart Disease."

METHODS: A comprehensive literature search was conducted from September 2021 to May 2022. Clinical studies, systematic reviews and meta-analyses, and other evidence conducted on human participants were identified that were published in English from MEDLINE (through PubMed), EMBASE, the Cochrane Library, Agency for Healthcare Research and Quality, and other selected databases relevant to this guideline.

STRUCTURE: This guideline provides an evidenced-based and patient-centered approach to management of patients with chronic coronary disease, considering social determinants of health and incorporating the principles of shared decision-making and team-based care. Relevant topics include general approaches to treatment decisions, guideline-directed management and therapy to reduce symptoms and future cardiovascular events, decision-making pertaining to revascularization in patients with chronic coronary disease, recommendations for management in special populations, patient follow-up and monitoring, evidence gaps, and areas in need of future research. Where applicable, and based on availability of cost-effectiveness data, cost-value recommendations are also provided for clinicians. Many recommendations from previously published guidelines have been updated with new evidence, and new recommendations have been created when supported by published data.

Ravi, Akshay, Eric Vittinghoff, Alan H B Wu, Leslie W Suen, Phillip O Coffin, Priscilla Hsue, Kara L Lynch, Sithu Win, Dhruv S Kazi, and Elise D Riley. (2023) 2023. “Cocaine Use Is Associated With Increased LVMI in Unstably Housed Women With Polysubstance Use.”. Substance Abuse 44 (4): 323-29. https://doi.org/10.1177/08897077231199572.

BACKGROUND: While substance use is known to influence cardiovascular health, most prior studies only consider one substance at a time. We examined associations between the concurrent use of multiple substances and left ventricular mass index (LVMI) in unhoused and unstably housed women.

METHODS: Between 2016 and 2019, we conducted a cohort study of unstably housed women in which measurements included an interview, serum/urine collection, vital sign assessment, and a single transthoracic echocardiogram at baseline. We evaluated independent associations between 39 separate substances confirmed through toxicology and echocardiography-confirmed LVMI.

RESULTS: The study included 194 participants with a median age of 53.5 years and a high proportion of women of color (72.6%). Toxicology-confirmed substance use included: 69.1% nicotine, 56.2% cocaine, 28.9% methamphetamines, 28.9% alcohol, 23.2% opioid analgesics, and 9.8% opioids with catecholaminergic effects. In adjusted analysis, cocaine was independently associated with higher LVMI (Adjusted linear effect: 18%; 95% CI 9.9, 26.6). Associations with other substances did not reach levels of significance and did not significantly interact with cocaine.

CONCLUSION: In a population of vulnerable women where the use of multiple substances is common, cocaine stands out as having particularly detrimental influences on cardiac structure. Blood pressure did not attenuate the association appreciably, suggesting direct effects of cocaine on LVMI. Routinely evaluating stimulant use as a chronic risk factor during risk assessment and preventive clinical care planning may reduce end organ damage, particularly in highly vulnerable women.