Hypertension and AFib: Reducing Heart Failure and Stroke Risk Through Early Detection and Blood Pressure Management

Atrial Fibrillation (AFib) Increases After Age 60, Particularly in Patients With Hypertension 

Atrial fibrillation (AFib) is the most common sustained arrhythmia, and its prevalence increases markedly after the age of 60^*1. Approximately 40% of patients with AFib are asymptomatic^*2. Hypertension is a major modifiable risk factor for AFib. Epidemiological data indicate that 49–90% of patients with AFib have concomitant hypertension^*3. Therefore, patients aged ≥60 years with hypertension — whether newly diagnosed or long-standing — represent a population at elevated and often unrecognized risk of AFib. In these individuals, daily blood pressure monitoring combined with routine assessment of heart rhythm may facilitate earlier detection.  

AFib Is a Progressive Disease Associated With Increased Risk of Heart Failure and Stroke 

AFib is typically not sustained continuously at onset. In many patients, early disease is characterized by intermittent episodes alternating with normal sinus rhythm. Over time, episode duration and frequency increase, reflecting disease progression. Both heart failure and stroke risk increase as AFib progresses. Prolonged cumulative AFib duration is associated with higher rates of adverse cardiovascular outcomes.  

Clinical Outcomes in Relation to AFib Episode Duration 

Device-based analyses using implanted pacemakers and defibrillators have demonstrated that: 

• AFib episodes exceeding 24 hours are associated with a significantly increased risk of stroke^*4. 

• AFib episodes lasting less than 24 hours are not associated with a statistically significant increase in stroke risk compared with patients without AFib^*4. 

Furthermore, progression to episodes ≥24 hours has been associated with a fivefold increase in hospitalization for heart failure^*5. While the optimal duration threshold of AFib that meaningfully influences clinical outcomes remains a subject of ongoing debate, these findings suggest that AFib episode duration is clinically relevant. Maintaining a lower AF Burden — particularly preventing progression to longer-duration episodes — may therefore be important for reducing the risk of heart failure and stroke.  

Expanded Rhythm Monitoring Identifies Early-Stage, Low AF Burden AFib 

Recent long-term ECG monitoring studies have shown that more than 70% of newly detected AFib episodes last ≤6 hours (median duration 38 minutes), indicating detection at an early stage. Similarly, arrhythmias detected through consumer wearable devices demonstrate that over 70% of AFib episodes last less than 24 hours^*7. As prolonged and frequent rhythm monitoring becomes more widespread, a greater proportion of patients are identified at a stage characterized by low AF Burden and relatively lower short-term thromboembolic risk. While anticoagulation remains the cornerstone of stroke prevention in appropriate-risk patients, initiation in low-risk individuals may present a net clinical benefit challenge due to bleeding risk. Accordingly, strategies aimed at preventing AFib progression and limiting AF Burden are of increasing importance in early-stage disease.  

Hypertension Control May Prevent AFib Onset and Progression 

Emerging evidence underscores the critical role of risk factor modification — particularly optimal hypertension control — in both primary and secondary prevention of AFib.  

Appropriate management of hypertension and other cardiovascular risk factors has been shown to: 

• Reduce incident AFib^*8 

• Prevent progression and reduce AF Burden^*9 

• Lower the risk of heart failure and stroke^*10 

• Reduce bleeding risk in patients receiving anticoagulation^*11 

Importantly, patients with AFib carry a substantially elevated absolute risk of cardiovascular events. Therefore, the absolute risk reduction achieved through antihypertensive intervention is likely to translate into meaningful improvements in clinical outcomes in this population^*12. Accordingly, blood pressure control remains critically important even after the diagnosis of AFib. For patients aged ≥60 years with hypertension, combined monitoring of blood pressure and cardiac rhythm may support both early detection and preventive strategies. 

Heart Failure Is the Leading Cause of Death and Hospitalization in Patients With AFib 

Historically, stroke prevention has been the principal focus in AFib management. However, as earlier detection increases identification of patients with lower AF Burden, attention must also shift to heart failure^*13. Heart failure represents the most common cause of mortality and hospitalization among patients with AFib. AFib and heart failure share bidirectional pathophysiological mechanisms, including structural remodeling, neurohormonal activation, and hemodynamic compromise. Comprehensive AFib management therefore requires consideration of heart failure risk in addition to thromboembolic risk. 

Clinical Significance of Heart Failure Screening Triggered by AFib Detection 

With the aging population and the increasing prevalence of lifestyle-related diseases in both older and younger individuals, heart failure with preserved ejection fraction (HFpEF) has been rising in recent years. In this context, simultaneous monitoring of blood pressure and AFib is clinically valuable from the standpoint of early detection and early intervention for HFpEF. For example, in a patient aged ≥60 years with hypertension in whom AFib is detected and unexplained exertional dyspnea is identified on clinical interview, the H₂FPEF score^*14 would be calculated as 5 points. In this setting, the probability that dyspnea is attributable to HFpEF is estimated to exceed 80%, strongly supporting suspicion of HFpEF. Accordingly, when AFib is detected during home blood pressure monitoring in patients aged ≥60 years, establishing a clinical pathway that includes proactive symptom inquiry for potentially masked heart failure manifestations, followed by prompt evaluation with BNP measurement and echocardiography, represents a rational strategy for early diagnosis and therapeutic intervention in heart failure. Based on the clinical evidence outlined above, Omron recommends the use of home blood pressure monitors equipped with AFib detection functionality, rather than conventional devices, as a standard approach for patients aged ≥60 years with hypertension. In routine clinical practice, these devices enable simultaneous and longitudinal monitoring of both blood pressure and AFib, facilitating efforts to maintain a clinical state in which AFib is less likely to occur and to confirm its absence over time. If possible AFib is detected, further evaluation of AF Burden using patch-based ECG monitoring may inform decisions regarding anticoagulation therapy and should also prompt consideration of heart failure assessment, with the potential to improve clinical outcomes. When short-duration, early-stage AFib is identified, a watchful waiting approach may often be appropriate. However, continued dual monitoring of blood pressure and AFib using home devices may contribute to risk reduction through optimized blood pressure control while also enabling early identification of increasing AF Burden that may warrant therapeutic escalation. This management strategy may represent a pragmatic and cost-effective long-term care model for patients at risk of AFib and those with established AFib, particularly in an era in which asymptomatic and low-burden AFib cases are increasingly detected and longer follow-up periods are anticipated. Importantly, this approach can be implemented without major disruption to existing clinical workflows while minimizing patient burden. In a future model built upon this framework, primary care physicians, electrophysiologists, and heart failure specialists would collaborate in the longitudinal management of AFib patients. The anticipated patient journey under such a coordinated care model is outlined below.  

*Figures and tables are reconstructed from the original publication for reference only. Please refer to the original article for exact values.