Cardiovascular Prevention and Pharmacotherapy

Original Article

Correlation between metformin intake and prostate cancer: Raeun Kim, Minsun Song, Jiwon Shinn, Hun-Sung Kim; Cardiovasc Prev Pharmacother. 2023;5(3):91-97. Published online July 31, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e12

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Abstract PDF: Background
The relationship between metformin intake and prostate cancer incidence remains unclear. Therefore, we examined the correlation between prostate cancer and metformin use.
Methods
The subjects were diabetes patients aged ≥50 years who had been diagnosed with prostate cancer and had undergone surgery at Seoul St. Mary's Hospital. Groups taking metformin (MET(+) group) and not taking metformin (MET(–) group) were divided and compared.
Results
The mean preoperative prostate-specific antigen (PSA) levels in the MET(–) and MET(+) groups were 10.7±11.9 and 8.0±5.6 ng/mL, respectively, with no statistically significant difference between the two groups (P=0.387). The average prostate volume of the MET(–) group was 82.4±98.0 mL, and the average prostate volume of the MET(+) group was 55.4±20.1 mL, but there was no statistically significant difference between the two groups (P=0.226). The mean PSA velocity also did not show a significant difference between the two groups (0.025±0.102 ng/mL vs. 0.005±0.012 ng/mL, P=0.221).
Conclusions
We did not identify a significant positive correlation between metformin and prostate cancer. However, preoperational PSA and PSA velocity tended to be lower in the MET(+) group. A sophisticated prospective study with a large sample size should be planned.

Review Article

Diabetes mellitus and cancer: Jae Won Hong; Cardiovasc Prev Pharmacother. 2023;5(3):69-73. Published online July 27, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e9

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Abstract PDF: Diabetes mellitus and cancer are the most common life-threatening illnesses worldwide. Previous epidemiological studies have suggested a strong association between diabetes mellitus and an increased risk of cancer. Potential biological mechanisms underlying this relationship include obesity, hyperglycemia, hyperinsulinemia, chronic inflammation, and oxidative stress. The most common diabetes-related cancers are pancreatic, hepatocellular, breast, endometrial, and colorectal cancer. Special attention should be paid to patients with diabetes through careful cancer screening and preventive anticancer strategies.

Original Articles

Obesity and 30-day case fatality after hyperglycemic crisis hospitalizations in Korea: a national cohort study: Hojun Yoon, Hyun Ho Choi, Giwoong Choi, Sun Ok Song, Kyoung Hwa Ha, Dae Jung Kim; Cardiovasc Prev Pharmacother. 2023;5(3):74-80. Published online July 27, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e10

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Abstract PDF Supplementary Material: Background
We determined the case fatality rate associated with hospitalization due to hyperglycemic crises and investigated the relationship between obesity status and case fatality for hyperglycemic crises.
Methods
From the Korean National Health Insurance Service-National Sample Cohort, 729 adults who visited the emergency room or were hospitalized due to hyperglycemic crises between January 1, 2010, and December 31, 2019, were included. Preobesity or obesity was defined as a body mass index ≥23.0 kg/m2. Case fatality rates are presented as the proportion of adults who died within 30 days of hospitalization. Cox proportional hazards models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for 30-day fatalities according to preobesity or obesity status.
Results
The 30-day case fatality rate for hyperglycemic crises was 11.2%. In those aged ≥65 years, the fatality rate was twice as high as that in those aged 20 to 64 years (13.8% vs. 6.8%). Adults with preobesity or obesity had a lower fatality rate than those with normal weight (9.5% vs. 14.0%). After adjustment for confounding variables, preobesity or obesity was found to be significantly associated with a decreased risk for 30-day case fatality compared to normal weight (HR, 0.63; 95% CI, 0.40–0.98).
Conclusions
In Korea, hyperglycemic crises had a high fatality rate. Management needs to be improved to prevent hyperglycemic crises and reduce mortality.

Relationship between serum ferritin levels during iron chelating therapy and diastolic left ventricular function in transfusion-induced iron overload: a 2-year follow-up study in patients with aplastic anemia: Woo-Baek Chung; Cardiovasc Prev Pharmacother. 2023;5(3):81-90. Published online July 26, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e11

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Abstract PDF: Background
The goal of the study was to investigate changes in cardiac function during iron chelating therapy (ICT) in patients with transfusion-induced iron overload.
Methods
We prospectively examined cardiac function in 21 aplastic anemia patients for 2 years by using transthoracic echocardiography before and during ICT.
Results
The serum ferritin level decreased from 4,961.5±2,917.9 µg/L to 2,466.9±2,533.1 µg/L after 2 years (P<0.001). The left ventricular ejection fraction decreased to under the normal limit (55%) in five patients. The serum ferritin level was positively correlated with the E/E’ ratio (r=0.595, P=0.004) and the left atrial (LA) volume (r=0.685, P=0.001) and negatively correlated with the deceleration time (r=–0.586, P=0.005) after 2 years of ICT. The seven responders (serum ferritin level <1,000 µg/L after 2 years of ICT) demonstrated a significantly higher ejection fraction, smaller LA volume and left ventricular end-systolic dimension, and a slower deceleration time than the 14 nonresponders (≥1,000 µg/L).
Conclusions
These results suggest that the response to ICT, which was estimated by the serum ferritin level, can reflect cardiac function during ICT. In nonresponders, cardiac function monitoring during ICT may be helpful for the early detection of cardiac dysfunction.

Review Articles

Research on obesity using the National Health Information Database: recent trends: Eun-Jung Rhee; Cardiovasc Prev Pharmacother. 2023;5(2):35-40. Published online April 28, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e8

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Abstract PDF: The prevalence of obesity has increased markedly in Korea during the past few decades. Korea is one of the most well-organized countries in terms of its National Health Insurance System (NHIS), which conducts screening examinations. Since the NHIS is unified and managed by the government, its data—contained in the National Health Insurance Database (NHID)—are centralized. The Korean government has recently encouraged researchers to access the NHID, conduct research, and write papers to convey their findings. Expanded research using the NHID could shed light on the future of big data research. In this review, I would like to present an overview of current trends in obesity research using the NHID.

Liraglutide, a glucagon-like peptide-1 analog, in individuals with obesity in clinical practice: Juyoung Shin, Raeun Kim, Hun-Sung Kim; Cardiovasc Prev Pharmacother. 2023;5(2):49-53. Published online April 28, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e7

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Abstract PDF: Obesity is a disease requiring treatment. The prevalence of obesity is steadily increasing both in Korea and worldwide. Individuals with obesity are at elevated risks of diabetes, cerebrovascular disease, and solid cancer; therefore, obesity is now considered to be a disease requiring treatment, rather than merely a cosmetic problem. Nutrition and exercise are the basic forms of obesity management, but it is not easy to lose weight through only one’s own willpower. Accordingly, policies for establishing a cultural environment that encourages desirable behaviors are proposed through multifaceted efforts involving the media and local organizations. However, the pharmacological and surgical treatments selected as medical interventions should be individualized based on an understanding of each individual’s cause of obesity and characteristics. It is important to understand how to enhance and maintain the effectiveness of treatment not only for the prescribing medical staff, but also for the individual with obesity who is being treated.

Original Articles

Correlation analysis of cancer incidence after pravastatin treatment: Jin Yu, Raeun Kim, Jiwon Shinn, Man Young Park, Hun-Sung Kim; Cardiovasc Prev Pharmacother. 2023;5(2):61-68. Published online April 28, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e6

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Abstract PDF: Background
Few studies have investigated the cancer-preventive effects of statins, which are known to protect against cardio-cerebrovascular diseases. In this study, we analyzed the degree to which pravastatin, a low-potency statin, could prevent cancer.
Methods
This retrospective cohort study used data from the Korean National Health Insurance Service database. Patients diagnosed with diabetes after the age of 50 years were divided into a pravastatin group and a control group that did not receive any statin prescriptions.
Results
This study included 557 patients in the pravastatin group and 2,221 patients in the control (no statin) group. During the 5-year follow-up, the incidence of cancer was 16.7% (93 of 557 patients) in the pravastatin group and 19.9% (442 of 2,221 patients) in the control group. The incidence of cancer was 22% higher in the control group than in the pravastatin group (hazard ratio, 1.22; 95% confidence interval, 0.97–1.52; P=0.09). Death from various causes occurred at a 45% higher frequency in the control group than in the pravastatin group (hazard ratio, 1.45; 95% confidence interval, 0.99–2.12; P=0.06). However, neither of those relationships reached statistical significance.
Conclusions
Although pravastatin use did not show a significant causal relationship with cancer incidence, fewer cases of cancer occurred in pravastatin users than in controls. However, further large-scale studies are required to confirm these findings.

Fabry disease screening in young patients with acute ischemic stroke in Korea: Yunjung Choi, Taedong Ok, Kyung-Yul Lee; Cardiovasc Prev Pharmacother. 2023;5(2):54-60. Published online April 24, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e5

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Abstract PDF: Background
Fabry disease is an X-linked lysosomal storage disorder that results from a mutation in the α-galactosidase A (GLA) gene. It shows multiple organ involvement, including cerebrovascular disease. Since Fabry disease has a prevalence of approximately 4% in young patients with cryptogenic stroke, screening for this condition is recommended for young stroke patients. This study aimed to investigate the prevalence of Fabry disease in young acute ischemic stroke patients in Korea, the distribution of GLA gene mutations, and the subtypes of ischemic stroke.
Methods
This study included 211 young patients with acute ischemic stroke or transient ischemic attack. To screen for Fabry disease, α-galactosidase A (α-Gal A) enzyme activity was measured and DNA sequencing analysis of the GLA gene was performed.
Results
None of the patients exhibited low α-Gal A enzyme activity or had a pathogenic GLA mutation, but 18 nonpathogenic GLA gene variants were detected, including c.-10C>T in 16 patients, c.-33C>T in one patient, and c.196G>C in one patient. The mean α-Gal A enzyme activity in 14 male patients with the c.-10C>T variant was 5.17±1.19, which was significantly lower than that of male patients with the normal genotype (7.47±3.48, P<0.05). The distribution of stroke subtypes in patients with GLA gene polymorphisms was not significantly different from that in patients with a normal genotype.
Conclusions
This study demonstrates that Fabry disease is rare in young patients with ischemic stroke or transient ischemic attack in Korea, and we suggest that routine screening for Fabry disease may not be necessary for ischemic stroke patients.

Review Article

Optimal target blood pressure in older patients with hypertension: Kwang-il Kim; Cardiovasc Prev Pharmacother. 2023;5(2):41-48. Published online April 24, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e4

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Abstract PDF: Hypertension is a common condition among older adults, and blood pressure (BP) control is effective for preventing cardiovascular morbidity and mortality even among the oldest-old adults. However, the optimal target BP for older patients with hypertension has been a subject of debate, with previous clinical trials providing conflicting evidence. Determining the optimal target BP for older adults is a complex issue that requires considering comorbidities, frailty, quality of life, and goals of care. As such, BP targets should be individualized based on each patient's unique health status and risk factors, and treatment should be closely monitored to ensure that it is effective and well-tolerated. The benefits and risks of intensive BP control should be carefully weighed in the context of the patient's overall health status and treatment goals. Ultimately, the decision to pursue intensive BP control should be made through shared decision-making between patients and their healthcare providers.

Original Articles

Modifiable risk factors for coronary artery disease in the Indonesian population: a nested case-control study: Anggoro Budi Hartopo, Maria Patricia Inggriani, Brilliant Winona Jhundy, Jajah Fachiroh, Putri Tiara Rosha, Ratri Kusuma Wardani, Fatwa Sari Tetra Dewi; Cardiovasc Prev Pharmacother. 2023;5(1):24-34. Published online January 31, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e3

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Abstract PDF: Background
There is a lack of data on modifiable coronary artery disease (CAD) risk factors in the Indonesian population, hindering the implementation of assessments and prevention programs in this population. This study investigated modifiable risk factors for CAD among Indonesians by comparing them between CAD-proven patients and healthy subjects from a similar population.
Methods
In this nested, matched case-control study, the cases were patients from a referral hospital in Yogyakarta, Indonesia and the controls were respondents in a population surveillance system in Yogyakarta, Indonesia. The cases were 421 patients who had undergone coronary angiography, showing significant CAD. The sex- and age-matched controls were 842 respondents from the Universitas Gadjah Mada Health and Health and Demographic Surveillance System Sleman who indicated no CAD presence on a questionnaire. The modifiable CAD risk factors compared between cases and controls were diabetes mellitus, hypertension, central obesity, smoking history, physical inactivity, and less fruit and vegetable intake. A multivariate regression model was applied to determine independent modifiable risk factors for CAD, expressed as adjusted odds ratios (AORs).
Results
A multivariate analysis model of 1,263 subjects including all modifiable risk factors indicated that diabetes mellitus (AOR, 3.32; 95% confidence interval [CI], 2.09–5.28), hypertension (AOR, 2.52; 95% CI, 1.76–3.60), former smoking (AOR, 4.18; 95% CI, 2.73–6.39), physical inactivity (AOR, 15.91; 95% CI, 10.13–24.99), and less fruit and vegetable intake (AOR, 5.42; 95% CI, 2.84–10.34) independently and significantly emerged as risk factors for CAD.
Conclusions
Hypertension, diabetes mellitus, former smoking, physical inactivity, and less fruit and vegetable intake were independent and significant modifiable risk factors for CAD in the Indonesian population.

Changes in cardiovascular-related health behaviors during the COVID-19 pandemic: Eunji Kim, Chan-Hee Jung, Dae Jung Kim, Seung-Hyun Ko, Hae-Young Lee, Kyung-Yul Lee, Dae Ryong Kang, Sung Kee Ryu, Won-Young Lee, Eun-Jung Rhee, Hyeon Chang Kim; Cardiovasc Prev Pharmacother. 2023;5(1):15-23. Published online January 27, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e2

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Abstract PDF Supplementary Material: Background
The COVID-19 pandemic has been the most pressing health challenge in recent years. Meanwhile, prevention for other diseases, such as cardiovascular disease (CVD) has been less prioritized during the pandemic. COVID-19, a novel infectious disease, both had a direct impact on public health and provoked changes in health-related behaviors, including those for CVD prevention. This study sought to examine changes in CVD-related health behaviors during the COVID-19 pandemic and related sociodemographic factors.
Methods
We used data from the Cardiovascular Disease Prevention Awareness Survey conducted in Korea in June 2022. A total of 2,000 adults across Korea’s 17 provinces completed a structured questionnaire online or on a mobile device. Self-reported changes in CVD-related health behaviors were investigated. We used unadjusted and adjusted logistic regression models to explore the associations between negative changes and sociodemographic factors.
Results
In smoking, drinking, and healthcare service use, the proportion of those with positive changes surpassed the proportion of respondents who reported negative changes. In contrast, negative changes predominated for diet, exercise, and stress. Most individuals (52.6%) reported a deterioration of psychological distress. These negative changes were significantly associated with age, sex, marital status, and the presence of cardiometabolic disease.
Conclusions
The COVID-19 pandemic has affected CVD-related health behaviors. Based on these changes, CVD prevention should be encouraged with appropriate and prioritized strategies.

Review Article

Adverse reactions to antiarrhythmic drugs: Ungjeong Do; Cardiovasc Prev Pharmacother. 2023;5(1):1-14. Published online January 16, 2023; DOI: https://doi.org/10.36011/cpp.2023.5.e1

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Abstract PDF: There are various types of adverse reactions to antiarrhythmic drugs (AADs). Proarrhythmia, which refers to an exacerbation of the preexisting arrhythmia or occurrence of a new arrhythmia, may occur under the therapeutic concentration of an AAD. Bradyarrhythmia is the most common type of proarrhythmia due to AADs, and prior myocardial infarction and old age are known risk factors. Atrial flutter with 1:1 atrioventricular conduction usually occurs during rhythm control of atrial fibrillation with class IC AADs. QT prolongation due to AADs, mainly class III AADs, elevates the risk of torsade de pointes by triggered activity due to early afterdepolarization. The addition of clinical factors that promote QT prolongation, such as hypokalemia, hypomagnesemia, female sex, and bradycardia, increases the risk of developing torsade de pointes. Proarrhythmic monomorphic ventricular tachycardia usually occurs as a result of slow conduction and disparity of refractoriness due to class IC AADs. In patients with preexisting left ventricular systolic dysfunction or structural heart disease, the risk of hypotension or cardiogenic shock caused by negative inotropic effects due to AADs should be considered. To prevent these major adverse reactions to AADs, we need to understand the electrophysiologic properties of AADs in detail. Furthermore, the risk of proarrhythmia could be heightened by interplay with clinical factors, such as electrolyte unbalances, heart rate, and hepatic/renal or myocardial dysfunction. Sufficient awareness about drug-drug interactions, which may affect the metabolism of AADs, will improve patient safety during the management of arrhythmia.

Original Article

Public awareness of cardiovascular disease prevention in Korea: Eunji Kim, Chan-Hee Jung, Eun-Jung Rhee, Junghyun Noh, Jae Hyuk Lee, Hun-Jun Park, Sungha Park, Sang-Hyun Ihm, Won-Young Lee, Hyeon Chang Kim; Cardiovasc Prev Pharmacother. 2022;4(4):149-157. Published online October 26, 2022; DOI: https://doi.org/10.36011/cpp.2022.4.e20

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Abstract PDF Supplementary Material: Background
The burden of cardiovascular disease (CVD) is significant in Korea. Ultimately, public knowledge and awareness of CVD risk factors and prevention are essential to reduce its burden. Hence, this study aimed to examine the level of public awareness of CVD risk factors and prevention in Korea in 2022.
Methods
We used data from the Cardiovascular Disease Prevention Awareness Survey conducted by the Korean Society of Cardiovascular Disease Prevention in June 2022. Using a structured web-based questionnaire, 2,000 individuals aged 20 years or more were surveyed on computers or mobile devices. Information on sociodemographic characteristics, the presence of cardiometabolic disease, CVD concerns and self-assessed likelihood, and awareness of CVD prevention were analyzed.
Results
Cancer (44.3%) was the most feared disease, followed by CVD (19.5%). Nevertheless, most respondents stated that they were likely to develop CVD in their lifetime (67.4%). Only 9.2% of respondents were aware of the details of recommendations to prevent CVD, and this level of knowledge was also low among respondents with cardiometabolic diseases (10.7%). Not smoking, being physically active, eating a healthy diet, and reducing alcohol consumption were deemed easy to implement. On the contrary, reducing stress, being physically active, and eating a healthy diet were considered the most difficult recommendations to practice.
Conclusions
Public awareness of CVD risk factors and prevention appeared to be insufficient in Korea. Our research suggests that simple but practical recommendations should be conveyed and promoted to raise public awareness, which is currently inadequate.

Review Articles

Metabolically healthy obesity: it is time to consider its dynamic changes: Yun Kyung Cho, Chang Hee Jung; Cardiovasc Prev Pharmacother. 2022;4(4):123-131. Published online October 24, 2022; DOI: https://doi.org/10.36011/cpp.2022.4.e19

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Abstract PDF: Obesity reduces life expectancy, lowers quality of life, and causes numerous cardiometabolic diseases and some cancers. However, the individual risk of developing obesity-associated comorbidities is highly variable and cannot be explained only by body mass index. Observations that some obese people have a low risk for cardiometabolic disorders gave rise to the notion of metabolically healthy obesity (MHO). Despite the lack of a precise definition, MHO is typically identified by normal glucose and lipid metabolism indices, as well as the absence of hypertension. In individuals with MHO, the absence of metabolic abnormalities may minimize the risk of mortality, cardiovascular diseases, chronic kidney disease, dementia, and cancer, compared to metabolically unhealthy individuals with obesity. However, MHO appears to be a temporary phenotype that may not confer permanent benefits to individuals with obesity, further justifying therapeutic efforts to maintain metabolic fitness. In this review, we describe the traits of the MHO phenotype, its changeable nature, and the factors associated with phenotype change. In addition, we discuss the clinical outcomes of the MHO phenotype, particularly focusing on the transition of metabolic health over time and its effect on cardiometabolic disorders. Finally, the clinical importance of maintaining metabolic health is emphasized.

The effects and side effects of liraglutide as a treatment for obesity: Jeonghoon Ha, Jin Yu, Joonyub Lee, Hun-Sung Kim; Cardiovasc Prev Pharmacother. 2022;4(4):142-148. Published online October 20, 2022; DOI: https://doi.org/10.36011/cpp.2022.4.e18

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Abstract PDF: The incidence of obesity is increasing throughout the world, including Korea. Liraglutide, the main purpose of which is glucose control, has recently gained significant attention due to its additional effect on weight loss. Liraglutide injections have been widely used as an important treatment for obese patients in Korea. In addition to weight loss, liraglutide has various other effects, such as prevention of cardiovascular disease. Despite its excellent effect on weight loss, notable side effects, such as nausea and vomiting, have also been associated with liraglutide. Despite these side effects, liraglutide has not been discontinued due to its beneficial effects on weight loss. Nonetheless, there are reports wherein patients did not experience weight loss upon taking the drug. As such, there is a possibility of liraglutide misuse and abuse. Therefore, physicians need to have a broad understanding of liraglutide and understand the advantages and disadvantages of liraglutide prescription.

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