Overview

What Is Atrial Fibrillation?

Your heart’s electrical system (called the conduction system) sends signals from the top chambers of heart (atria) at regular intervals to control the rhythm of your heartbeat.

Atrial fibrillation is an irregular heartbeat that prevents the atria from contracting normally. Instead, the atria quiver, decreasing the amount of blood ejected from the heart with each heartbeat.

Caused by abnormal, irregular electrical signals from the conduction system, atrial fibrillation is a complex condition affecting close to five million people in the United States. It is responsible for 15 to 20 percent of all strokes. It is more common in people who are 65 and older, more often affecting men than women. There is a 1 in 4 risk that you or a loved one will develop atrial fibrillation. The earlier atrial fibrillation is diagnosed and treated, the more successful we are in retuning a patient to a “normal” rhythm.

Six niche centers within Northwestern Medicine Bluhm Cardiovascular Institute offer patient focused, specialized care, making Bluhm Cardiovascular Institute a leading destination for both initial diagnoses and second opinions. These niche programs include physicians, nurses and a range of multidisciplinary specialists working with patients to navigate the complex health care system, ensuring continuity of care and a seamless shift from inpatient to outpatient services and ultimately home.

Contact Us
To schedule an appointment or inquire about services at Bluhm Cardiovascular Institute at Northwestern Memorial Hospital, please call 312.NM.HEART (664.3278).

Cardiovascular Clinical Trials
For information regarding cardiovascular clinical trials:

Referring Physicians
Open communication and cooperation with referring physicians is a critical component of achieving high-quality care and minimizing the challenges that come with treating cardiovascular conditions. For physician-to-physician consultation regarding the best patient care, please contact Bluhm Cardiovascular Institute at 312.NM.HEART (664.3278).



Six niche centers within Northwestern Medicine Bluhm Cardiovascular Institute offer patient focused, specialized care, making Bluhm Cardiovascular Institute a leading destination for both initial diagnoses and second opinions. These niche programs include physicians, nurses and a range of multidisciplinary specialists working with patients to navigate the complex health care system, ensuring continuity of care and a seamless shift from inpatient to outpatient services and ultimately home.

Contact Us
To schedule an appointment or inquire about services at Bluhm Cardiovascular Institute at Northwestern Medicine Lake Forest Hospital, please call 847.53.HEART (534.3278).

Cardiovascular Clinical Trials
For information regarding cardiovascular clinical trials:



Six niche centers within Northwestern Medicine Bluhm Cardiovascular Institute offer patient focused, specialized care, making Bluhm Cardiovascular Institute a leading destination for both initial diagnoses and second opinions. These niche programs include physicians, nurses and a range of multidisciplinary specialists working with patients to navigate the complex health care system, ensuring continuity of care and a seamless shift from inpatient to outpatient services and ultimately home.

Contact Us
To schedule an appointment or inquire about services at Bluhm Cardiovascular Institute at Northwestern Medicine Central DuPage Hospital or Northwestern Medicine Delnor Hospital, please call 630.232.0280

Cardiovascular Clinical Trials
For information regarding cardiovascular clinical trials:



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