Keishi Ichikawa

ORCID: 0000-0003-0657-514X
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About
Contact & Profiles
Research Areas
  • Cardiac Imaging and Diagnostics
  • Cardiovascular Disease and Adiposity
  • Cardiovascular Function and Risk Factors
  • Liver Disease Diagnosis and Treatment
  • Lipoproteins and Cardiovascular Health
  • Coronary Interventions and Diagnostics
  • Liver Disease and Transplantation
  • Atherosclerosis and Cardiovascular Diseases
  • Cardiovascular, Neuropeptides, and Oxidative Stress Research
  • Acute Myocardial Infarction Research
  • Cardiovascular Health and Disease Prevention
  • Advanced X-ray and CT Imaging
  • Cardiac Valve Diseases and Treatments
  • Blood Pressure and Hypertension Studies
  • Advanced MRI Techniques and Applications
  • Cerebrovascular and Carotid Artery Diseases
  • Ultrasound Imaging and Elastography
  • Dialysis and Renal Disease Management
  • Cardiac tumors and thrombi
  • Doping in Sports
  • Metabolism, Diabetes, and Cancer
  • Ultrasound and Hyperthermia Applications
  • Takotsubo Cardiomyopathy and Associated Phenomena
  • Cardiovascular Health and Risk Factors
  • Peripheral Artery Disease Management

UCLA Medical Center
2023-2025

Harbor–UCLA Medical Center
2023-2025

Okayama University
2019-2025

Cardiovascular Research Foundation
2024

Kawasaki Medical School
2022

Jichi Medical University
2020

Okayama University Hospital
2018-2020

Fukuyama Cardiovascular Hospital
2019

Iwakuni Medical Center
2014-2017

Ichikawa Junior and Senior High School
2016

Abstract Background Pericoronary adipose tissue (PCAT) attenuation on coronary computed tomography angiography (CTA) is a non-invasive biomarker for pericoronary inflammation. We aimed to investigate the prognostic value of PCAT in patients with type 2 diabetes mellitus (T2DM). Methods included 333 T2DM (mean age, 66 years; male patients, 211; mean body mass index, 25 kg/m ) who underwent clinically indicated CTA and examined their CT findings, artery calcium score, pericardial fat volume,...

10.1186/s12933-022-01478-9 article EN cc-by Cardiovascular Diabetology 2022-03-18

Abstract Background Risk stratification of cardiovascular events in patients with type 2 diabetes mellitus (T2DM) has not been established. Coronary artery calcium score (CACS) and non-alcoholic fatty liver disease (NAFLD) are independently associated T2DM patients. This study examined the incremental prognostic value NAFLD assessed by non-enhanced computed tomography (CT) addition to CACS Framingham risk (FRS) for Methods prospective pilot included 529 outpatients no history who underwent...

10.1186/s12933-020-01192-4 article EN cc-by Cardiovascular Diabetology 2021-01-07

This study aimed to investigate additional risk stratification benefits of hepatic steatosis (HS) concurrently assessed during coronary computed tomography angiography (CTA) in a large patient cohort with suspected stable artery disease (CAD).In this prospective study, 1148 Japanese outpatients without history CAD who underwent CTA for (mean age 64 ± 14 years) were included. HS, defined on CT as hepatic-to-spleen attenuation ratio <1.0, was examined just before the evaluation adverse...

10.1093/eurjpc/zwab120 article EN cc-by-nc European Journal of Preventive Cardiology 2021-06-26

Abstract Aims Heart failure with a preserved ejection fraction (HFpEF) is associated chronic inflammation. We aimed to investigate the association between pericoronary adipose tissue attenuation (PCATA) on coronary computed tomography angiography as novel noninvasive marker of inflammation and presence HFpEF. Methods results This retrospective study included 607 outpatients (median age, 65 years; 50% male) who underwent both echocardiography angiography. Patients obstructive artery disease...

10.1002/ehf2.14419 article EN cc-by-nc ESC Heart Failure 2023-05-31

Artificial intelligence quantitative CT (AI-QCT) determines coronary plaque morphology with high efficiency and accuracy. Yet, its performance to quantify lipid-rich remains unclear. This study investigated the of AI-QCT for detection low-density noncalcified (LD-NCP) using near-infrared spectroscopy-intravascular ultrasound (NIRS-IVUS).The INVICTUS Registry is a multi-center registry enrolling patients undergoing clinically indicated angiography IVUS, NIRS-IVUS, or optical coherence...

10.1016/j.atherosclerosis.2023.117363 article EN cc-by-nc-nd Atherosclerosis 2023-10-29

Exercise is widely recognized for its cardiovascular benefits, including reduced mortality and a lower risk of events. However, recent studies suggest that athletes may exhibit paradoxical increase in coronary artery calcium (CAC) high-risk plaque morphology. Additionally, there considerable conflicting evidence numerous gaps current research on this topic. With the growing population athletes, particularly “Master Athletes’, understanding implications atherosclerosis group increasingly...

10.33696/cardiology.6.064 article EN Journal of Clinical Cardiology 2025-01-01

Pericoronary fat attenuation index (FAI) assessed on computed tomography is associated with the inflammation of pericoronary artery. This study aimed to investigate whether FAI predicts hospitalization for heart failure preserved ejection fraction (HFpEF). retrospective single-center included 1,196 consecutive patients who underwent clinically indicated coronary angiography (CCTA) and transthoracic echocardiography. We proximal 40-mm segments each major epicardial vessel. The primary outcome...

10.1016/j.jacadv.2025.101685 article EN cc-by JACC Advances 2025-04-25

This study compared the prognostic value of quantified thoracic artery calcium (TAC) including aortic arch on chest CT and coronary (CAC) score ECG-gated cardiac CT. Methods A total 2412 participants who underwent both at same period were included in Multi-Ethnic Study Atherosclerosis Exam 5. All monitored for incident atherosclerotic cardiovascular disease (ASCVD) events. TAC is defined as calcification ascending aorta, descending aorta The quantification was measured using Agatston method....

10.1136/heartjnl-2023-323838 article EN Heart 2024-04-16

Although blood pressure (BP) is a major determinant of arterial stiffness, whether high pulse wave velocity (PWV) adversely influences cardiac parameters and cardiovascular (CV) outcome in patients without BP remains unclear.Outpatients (n=320), defined as systolic ≥140 mm Hg, were enrolled this retrospective study. At baseline, all underwent echocardiography multidetector CT to determine the coronary artery calcification (CAC) score. Arterial stiffness was assessed based on brachial-ankle...

10.1136/heartjnl-2017-311751 article EN Heart 2017-08-16

Several studies have reported that the cardio-ankle vascular index (CAVI), a non-invasive measurement of arterial stiffness, is associated with incidence cardiovascular events. We investigated whether adding CAVI to risk score improves prediction events in setting primary prevention. This retrospective observational study included consecutive 554 outpatients disease factors but without known (68 ± 9 years, 64% men). The was measured using VaSera screening system. Major adverse (MACE) death,...

10.3390/jcdd9110368 article EN cc-by Journal of Cardiovascular Development and Disease 2022-10-25

Abstract Background For the prevention of future cardiovascular events, control residual risks such as triglyceride rich lipoproteins and HDL-cholesterol is an emerging problem beyond LDL-cholesterol. Triglyceride to ratio (TG/HDL ratio) has been reported be useful for risk classification diseases. Meanwhile, several studies showed that high-risk plaque characteristics evaluated with coronary CT angiography (cCTA) was associated incidence acute syndrome. However, relationship TG/HDL its...

10.1093/ehjci/ehaa946.2930 article EN European Heart Journal 2020-11-01
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