If you have heart disease, a heart-healthy diet begins by paying close attention to what you eat. You can reduce your chance of developing atherosclerosis, the blocked arteries that cause heart disease, with a heart-healthy diet. If the artery-clogging process has already begun, you can slow the rate at which it progresses.
While this is very important for everyone at risk for atherosclerosis, it is even more important if you have had a heart attack or a procedure to restore blood flow to your heart...
Sinus tachycardia is present when
a person's heart rate is over 100 beats per minute and there is a clear reason
for the fast heart rate, such as exercise, pain, or fever. A fast heart rate is
normal under these circumstances. With sinus tachycardia, the electrical system
of the heart is working normally.
This type of fast heart rate
seldom requires treatment other than correcting the health condition
that may be causing the fast heart rate.
Sinus node reentrant tachycardia
reentrant tachycardia is a rare type of fast heart rate. This type is caused by
abnormal conduction of electrical impulses within the
Sinus node reentrant
tachycardia begins and ends very suddenly. Diagnosis is frequently made during
an electrophysiology (EP) study. Treatment may include
long-term medicines (such as beta-blockers or calcium channel blockers) or
Atrial tachycardia is a type of
fast heart rate caused by rapid electrical signals that begin in the upper
chambers of the heart. As a result, the heart can sometimes beat very
Treatment of this type of rhythm depends on the cause of
the fast heart rate and often involves taking medicines (such as digoxin,
beta-blockers, or calcium channel blockers). Many atrial tachycardias can also
be successfully cured using ablation. The site or sites in the atria
responsible for the rapid heart rate can be located and destroyed. Only rarely
is ablation of the atrioventricular (AV) node and placement of a permanent
AV node ablation involves using heat or freezing
cold to destroy the AV node. The AV node passes impulses to the lower heart
chambers (ventricles). Destroying the AV node prevents fast, erratic pulses
from the upper chambers from reaching the lower heart chambers. This can
prevent episodes of rapid heart rate. It is most often used in people with
difficult-to-control atrial fibrillation and severe symptoms.
After AV node ablation, a pacemaker is needed to send regular impulses to
the lower heart chambers (ventricles).
Multifocal atrial tachycardia
tachycardia (MAT) is an abnormal, rapid rhythm that occurs most commonly in
individuals with severe lung disease. It can also occur after a heart attack,
in someone with low blood levels of magnesium or potassium, and as a side
effect of certain medicines such as aminophylline.
rhythm, three or more different areas of the atrium initiate extra heartbeats.
It is somewhat similar to having several different kinds of premature atrial
contractions (PACs) occurring in the same person. These different areas of
electrical activity can be seen on an
electrocardiogram (EKG, ECG) and are used as the
criteria for diagnosing this arrhythmia. People with this arrhythmia frequently
complain of palpitations.
On EKG, multifocal atrial tachycardia
may appear similar to atrial fibrillation, but it is a distinct condition. The
problem with this rhythm is that it causes a persistently fast heart rate that
may be difficult to control. Calcium channel blockers such as verapamil are
occasionally effective. But the most effective way to control this rhythm is by
treating the disease causing the arrhythmia, and this is usually lung
Junctional tachycardia is a
rare fast heart rate that starts in the area between the upper and lower
chambers of the heart. This rhythm frequently affects adults who have heart
disease and children who have had heart surgery.
Some people may
require catheter ablation. Children may be treated with long-term medicines if
the fast heart rate continues.
Inappropriate sinus tachycardia
tachycardia is present when a person's heart rate is over 100 beats per minute
with no apparent cause. In this rare condition, the electrical system of the
heart is working normally. There are no outside factors present to explain why
the heart is beating so fast.
People with inappropriate sinus
tachycardia typically do not have any heart disease. Inappropriate sinus
tachycardia with no heart disease may mean your
autonomic nervous system is not working right.
Treatment of this type of rhythm depends on the cause of the fast heart
rate. Treatment often involves taking medicines such as digoxin, beta-blockers,
or calcium channel blockers. If the problem continues in spite of these
treatments and is causing symptoms, ablation of the atrioventricular (AV) node
or sinus node and placement of a permanent pacemaker sometimes may be
Primary Medical Reviewer
E. Gregory Thompson, MD - Internal Medicine
Specialist Medical Reviewer
John M. Miller, MD - Electrophysiology
August 9, 2010
WebMD Medical Reference from Healthwise
August 09, 2010
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this