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Abnormal heart rhythms (arrhythmia)

An abnormal heart rhythm is when your heart beats too slow, too fast or with an irregular pattern. Symptoms may include chest pain, dizziness, fluttering in your chest and a racing heartbeat. While most abnormal heart rhythms are not dangerous, they may indicate serious underlying heart disease. Find out more below.

Irregular heartbeat a possible side effect of osteoporosis medication
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  • Evidence Summary

    Educational and behavioural interventions for anticoagulant therapy in patients with atrial fibrillation

    Rating 5 out of 5 stars
    Cochrane Database of Systematic Reviews (2017)
  • Evidence Summary

    Pre-hospital versus in-hospital initiation of cooling for survival and neuroprotection after out-of-hospital cardiac arrest

    Rating 5 out of 5 stars
    Cochrane Database of Systematic Reviews (2016)
  • Evidence Summary

    Psychological interventions for depression and anxiety in patients with coronary heart disease, heart failure or atrial fibrillation.

    Rating 4 out of 5 stars
    Cochrane Database Syst Rev (2024)
  • Evidence Summary

    Factor Xa inhibitors versus vitamin K antagonists for preventing cerebral or systemic embolism in patients with atrial fibrillation.

    Rating 4 out of 5 stars
    Cochrane Database Syst Rev (2018)
  • Evidence Summary

    In people 65 years or older, new anticoagulant pills reduce stroke, with fewer serious bleeds, compared with warfarin

    Rating 4 out of 5 stars
    Age Ageing (2017)
  • Evidence Summary

    Web-based interventions are effective in the short term for improving risk factors associated with cardiovascular disease in older individuals

    Rating 4 out of 5 stars
    Journal of Medical Internet Research (2016)
  • Evidence Summary

    Mobile health interventions can improve medication adherence and physical activity in patients with cardiovascular disease

    Rating 4 out of 5 stars
    European Journal of Preventative Cardiology (2015)
  • Evidence Summary

    In people with blood clots in the leg or certain heart rhythm problems, direct oral anticoagulants reduce deaths due to blood clots or bleeding compared with warfarin

    Rating 4 out of 5 stars
    J Thromb Haemost (2015)
  • Evidence Summary

    In people with heart failure, implanted cardiac devices with both resynchronization and defibrillation save more lives than either alone

    Rating 4 out of 5 stars
    Heart (2015)
  • Evidence Summary

    Some new anticoagulant pills reduce cardiovascular events and serious bleeding

    Rating 4 out of 5 stars
    Circulation (2015)
  • Evidence Summary

    Nurse-led clinics can lower the risk of death and myocardial infarction, and increase medication adherence in patients with cardiovascular diseases

    Rating 4 out of 5 stars
    Journal of Cardiovascular Nursing (2015)
  • Evidence Summary

    Direct thrombin inhibitors versus vitamin K antagonists for preventing cerebral or systemic embolism in people with non-valvular atrial fibrillation.

    Rating 4 out of 5 stars
    Cochrane Database Syst Rev (2014)
  • Evidence Summary

    New anticoagulant pills reduce cardiovascular events and do not increase serious bleeding

    Rating 4 out of 5 stars
    J Am Geriatr Soc (2014)
  • Evidence Summary

    Bisphosphonates increase risk of serious atrial fibrillation by a small amount

    Rating 4 out of 5 stars
    Chest (2013)
  • Evidence Summary

    In people with, or at risk of, heart disease, fatty acid supplements do not prevent heart attacks or death

    Rating 4 out of 5 stars
    Ann Intern Med (2014)
  • Evidence Summary

    (a) In patients with atrial fibrillation, 2 tools are best for predicting risk for stroke; a third tool is best for predicting risk for bleeding

    Rating 4 out of 5 stars
    AHRQ Comparative Effectiveness Reviews (2013)
  • Evidence Summary

    For people with atrial fibrillation, new “blood thinners” (factor Xa inhibitors) reduce strokes and clots more than warfarin

    Rating 4 out of 5 stars
    Cochrane Database Syst Rev (2013)
  • Evidence Summary

    Efficacy and safety of ablation for people with non-paroxysmal atrial fibrillation.

    Rating 3 out of 5 stars
    Cochrane Database Syst Rev (2016)
  • Evidence Summary

    Telerehabilitation may be a feasible way to encourage exercise and improve physical functioning among those with cardiopulmonary disease

    Rating 3 out of 5 stars
    Journal of Cardiopulmonary Rehabilitation and Prevention (2015)
  • Evidence Summary

    People with dementia living in the community and their caregivers may benefit most from interventions with multiple components that are tailored to their needs

    Rating 3 out of 5 stars
    BMC Geriatrics (2015)
  • Evidence Summary

    Self-management support interventions improve patient quality of life and reduce use of hospital care for patients with long-term respiratory and cardiovascular conditions

    Rating 3 out of 5 stars
    Health Services and Delivery Research (2014)
  • Blog Post

    Mental health and heart disease: Can psychological therapies help?

    Getting to the heart of it! Psychological therapies can play a role in improving the mental health of people living with heart disease.
  • Blog Post

    Abnormal heart rhythms: How do different medications stack up?

    For people with atrial fibrillation, newer blood thinners may be safer and more effective than older, more commonly prescribed medications.
  • Blog Post

    Irregular heartbeat a possible side effect of osteoporosis medication

    Bisphosphonates are drugs that help increase bone strength in people with osteoporosis. They are effective, but may also contribute to irregular heartbeats (atrial fibrillation).
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