How can high blood pressure cause atrial fibrillation?

2 mechanisms . First - high blood pressure increases the pressures in your heart and left atrium which triggers the pulmonary veins to fire and send out electrical signals that can short circuit the heart. Second - long standing hypertension dilates the atria and causes fibrosis which makes it easier to short circuit those chambers and stay in atrial fibrillation.
Atrial dilitation. High blood pressure can cause the left ventricle to enlarge. As the walls of the ventricle thicken they also become stiff, and the left atrium then has a hard time to pump blood into it. This then causes the atrium to enlarge (dilate) and once it gets to about 5 cm2 it has a hard time to contract normally, and may instead contract in an uncoordinated and disorganised manner called fibrillation.

Related Questions

What issues could there be with my thyroid profile given that I suffer from high blood pressure and atrial fibrillation?

TSH low and T4 HIGH. If this is caused by thyroid disease it would be HYPERTHYROIDISM--which causes a low TSH and a raised THYROXINE level. Read more...
?hyperthyroidism. Both hyperthyroidism and hypothyroidism produce changes in cardiac contractility, myocardial oxygen consumption, cardiac output, blood pressure, systemic vascular resistance.Well known that hyperthyroidism can produce atrial fibrillation,less well recognized that hypothyroidism can predispose to ventricular dysrhythmias.In almost all cases cardiovascular changes reversed by thyroid hormone therap. Read more...

Could you tell me if person has atrial fibrillation, is taking metoprolol, Valium as needed. Also now require second medication for high blood pressure which one can go with Valium above.

Adjust Metoprolol. Most antihypertensives may be used. However, my first choice is to adjust the dose of metoprolol. Rate control is more important than rhythm control with atrial fibrillation. Thus, metoprolol should be adjusted to maintain the heart rate at 65-75 beats per minute. Another medication to consider is dilantin. Dilantin is very safe, and is an effective anti-arrhythmic. See book by jack dreyfus. Read more...
Diuretic. Hydrochlorothiazide would be inexpensive, once a day, free of side effects for most people, safe and effective if kidney function is normal and one is not allergic to the med. It would go well with metoprolol and valium. Read more...
Any. Being on valium does not affect the choice of your high blood pressure medication. If your heart rate is not well controlled while in atrial fibrillationwith metoprolol, you may benefit from a calcium channel blocker (diltiazem or verapmil) which would help control your heart rate and also lower the blood pressure. Read more...

Grandmother has atrial fibrillation am I at increased risk? I have sinus tachycardia and high blood pressure

Yes and no. It's not inherited but everyone is at risk with aging. At 17, the incidence is near 0. By the time you're 70, the incidence is 10%. Sinus tachycardia is not a risk factor but high blood pressure is! to avoid af when you're older, get your BP under control and keep it there. Read more...
Tough call. You're asking a good question that's hard to answer. 3 million people in the us have atrial fibrillation, and of those, ~30% have at least 1 family member with afib. But because there's so much afib out there, and because the prevalence is so high in advanced age (8% at 80yrs, 16%+ at 90) it's hard to decide what the specific risk due to any given family member is. Read more...

Atrial fibrillation + high blood pressure 141/87. On 4mg warfarin INR 3 / 5mg amlodipine 5mg bisoprolol for 3months. Why isnt BP going down. What risks?

Compensation. Sometimes when you start BP meds, the kidneys compensate in an attempt to maintain the (too high) BP. Add a mild diuretic like hydrochlorothiazide 25 mg (cheap as water, gentle, you won't even know you're taking it) and I'll bet you'll see your BP fall nicely. Your INR is perfect! Read more...

If I have a blood pressure of 120/80, is it possible that I will suffer from atrial fibrillation?

BP Atrial Fib. The blood pressure is not necessarily connected with atrial fibrillation. You can have a normal blood pressure as your describe and still acquire atrial fibrillation. Read more...
Unrelated. Blood pressure and fibrillation are related in that structural changes in the heart can ultimately lead to fibrillation, but in the short term, blood pressure does not generally provoke afib. There is a common link in adrenaline-like chemicals in your blood which can both raise BP and trigger fibrillation, but that's a longer story. Read more...

Can hypertension cause atrial fibrillation?

Yes. Atrial fibrillation is an irregularly irregular heart rhythm , it can happen when the atrium( upper chamber of the heart) is enlarged. Hypertension causes the heart to work harder, develops hypertrophy to have enough force to push the blood forward from the ventricle ( lower chamber of the heart); the atrium in turn enlarges to push blood to ventricle and eventually dilates then a-fib develops. Read more...
Indirectly. Hypertension can cause congestive heart failure. The increased heart pressures from the congestive heart failure can then lead to distention of the atria and subsequent atrial fibrillation. Read more...

Which is better and more safe in general for treating hypertension and atrial fibrillation metoprolol succinate or bisoprololesp. If s.creatinine1.56?

Neither. In clinical. trials, carvedilol has significantly better outcomes than either metoprolol (e.g. 3%/yr lower mortality rates continuing for many years) or bisoprolol. Creatinine is quite another issue, produced by all muscle cells, yet used to crudely estimate renal filtering function, not the 4 known responses to carvedilol. Yet the clinical trial data for all the Beta blockers is as augmenters to ACEI agents. Read more...

What is the safest anticoagulant to be used in 72 yr patient with paroxysmal atrial fibrillation and hypertension?

Anticoagulation. Your doctor needs to evaluate the situation and pick an agent that is the best for the individual situation. There are many factors to be considered and a one size fits all recommendation is not in general appropriate. Read more...