Publications by authors named "Satoshi Shimoo"
Article Synopsis
- Hypertension is a known risk factor for atrial fibrillation (AF) and strokes, but there is limited research on AF screening in hypertensive patients and its link to blood pressure levels.
- A study involving over 4,000 hypertensive patients aged 60 and older in Japan measured their electrocardiograms (ECG) and blood pressure (BP) at home for three months.
- The study found that 5.8% of participants had undiagnosed AF, with no significant differences in AF detection rates based on different baseline BP categories or the use of antihypertensive medication.
Article Synopsis
- Atrial fibrillation (AF) is categorized by duration into paroxysmal, persistent, and long-standing persistent types, with longer durations increasing the risk of recurrence during catheter ablation treatment.
- The study aims to enhance the diagnosis accuracy of AF duration through a predictive model, utilizing data from 272 patients to train a machine learning algorithm.
- Results showed the model achieved 81.8% accuracy in predicting AF duration, significantly improving cardiologists' diagnostic performance from 63.9% to 71.6% after using the model's insights.
Key Clinical Message: This case highlights the pitfalls and provides tips for the extraction of deeply implanted lumenless leads, and encourages careful lead selection in the current era of widespread left bundle branch area pacing.
Abstract: The extraction of cardiovascular implantable electronic device leads is sometimes complicated. We describe a case with difficult but successful extraction of SelectSecure, a lumenless permanent pacemaker lead, implanted deep in the ventricular septum, highlighting its pitfalls and tips in the current era of left bundle branch area pacing.
Background: The impact of sleep apnea (SA) on heart rate variability (HRV) in atrial fibrillation (AF) patients has not been investigated.
Methods and results: Of 94 patients who underwent AF ablation between January 2021 and September 2022, 76 patients who had a nocturnal Holter electrocardiography and polysomnography conducted simultaneously were included in the analysis. A 15-min duration of HRV, as determined by an electrocardiogram during apnea and non-apnea time, were compared between patients with and without AF recurrence at 12 months' postoperatively.
Background: This multicenter prospective observational study examined the impact of additionally using a home electrocardiograph (ECG) to detect atrial fibrillation (AF) recurrence after ablation.
Methods: Between May 2019 and December 2020, 128 patients undergoing ablation were enrolled in the study. After performing ablation, they were instructed to measure their ECGs at home using Complete (ECG paired with a blood pressure monitor; Omron Healthcare, Japan) every day and to visit the hospital every 3 months until after 12 months for 24-hour Holter ECG and 12-lead ECG as usual care (UC).
Article Synopsis
- Balloon ablation therapy, particularly Extended Laser Balloon Ablation (LBA), shows promise for treating atrial fibrillation by improving isolation of pulmonary veins compared to Cryoballoon Ablation (CBA).
- In a study involving 65 patients, Extended LBA achieved a larger isolated area in the superior pulmonary veins than both Standard LBA and CBA.
- Despite the greater effectiveness in isolating areas, Extended LBA resulted in lower levels of cardiac injury markers compared to CBA, indicating a potentially safer option for patients.
Article Synopsis
- The study identified a new form of verapamil-sensitive fascicular ventricular tachycardia (VT) called reverse-type left posterior fascicular VT (LPFVT), which had not been previously reported.
- Researchers found this reverse-type VT in 3 patients and noted specific characteristics like narrow QRS configurations and unique activation patterns.
- Radiofrequency catheter ablation targeting certain areas in the heart effectively suppressed this new VT type, suggesting that it shares circuit features with the more common LPFVT.
Incomplete filter opening, causing filter migration and inferior vena cava (IVC) perforation, have often been observed with the Greenfield-type IVC filter, but reports of incomplete opening of the ALN-type IVC filter are extremely rare. We present herein the case of incomplete opening of an ALN-type IVC filter due to entanglement of the filter legs, which caused filter migration, IVC wall perforation, and penetration into the kidney and iliopsoas muscle. Successful percutaneous retrieval was performed without complications.
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- Cholesterol crystals (CCs) may play a significant role in the progression and vulnerability of atherosclerotic plaques, impacting coronary artery health.
- A study assessed 55 acute coronary syndrome (ACS) and 80 stable angina pectoris patients, revealing that while CC incidence was similar, CCs were located closer to the surface in ACS patients.
- The findings suggest that the depth of CCs within plaques correlates with increased plaque vulnerability, making CC depth a potential new indicator for evaluating coronary artery health.
Article Synopsis
- The study assessed the effectiveness of using a motorized pullback technique with pressure guidewires to evaluate coronary lesions' characteristics and the benefits of interventions, particularly in patients undergoing PCI.
- Results showed that the average FFR values improved significantly after PCI, indicating successful intervention, with a median increase and correlation between percentage FFR area and changes in FFR values.
- Additionally, the technique offered valuable insights into lesion morphology, such as length and pressure-drop patterns, which could guide better stent placement and enhance diagnostic accuracy in coronary procedures.
Article Synopsis
- Myocardial perfusion SPECT is an effective tool for predicting cardiac events in patients with coronary artery disease, but sometimes may give false negatives.
- The study assessed the value of the Heart Risk View software in evaluating cardiac risk among patients who had normal MPS results.
- Among 698 patients studied, those identified with a higher cardiac event probability by Heart Risk View had significantly more cardiac events during follow-up, indicating that this tool enhances risk assessment even when SPECT results are normal.