The heart is an amazing organ. It is
located under the rib cage, to the left of the breastbone (sternum) and between
the lungs. It pumps oxygen and nutrient-rich blood throughout the body to
sustain life. This fist-sized powerhouse beats (expands and contracts) 100,000
times per day, pumping five or six quarts of blood each minute, or about 2,000
gallons per day. As the heart beats, it pumps blood through a system of blood
vessels, called the circulatory system. The vessels are elastic, muscular tubes
that carry blood to every part of the body. There are three main types of blood
vessels; Arteries, Capillaries, and Veins. This vast
system of blood vessels -- arteries, veins, and capillaries -- is over 60,000
miles long. We can travel around the world twice with that length.
Heart attacks are a leading killer of both men
and women in the United States. The good news is that excellent treatments are
available for heart attacks. How does a heart attack occur? A heart
attack happens when the flow of oxygen-rich blood to a section of
heart muscle suddenly becomes blocked and the heart blocks the oxygen and as a
result the heart is starved of oxygen and heart cells die. This
happen when plaque in the coronary artery breaks and a blood clot forms in
the artery. Plaque is a build-up of cholesterol, white blood cells, calcium,
and other substances in the walls of arteries. Over time, plaque narrows the
artery and the artery hardens (atherosclerosis). This condition is called
coronary artery disease. Sometimes a blood clot that forms over a ruptured
plaque may not completely block the artery. But the clot may block blood flow
enough to cause unstable angina. Unstable angina is a sign that a heart attack
may soon follow, because the blood clot can quickly grow and block the artery.
If the blood clot dissolves and an immediate heart attack are avoided, the body
will try again over time to repair the tear on the surface of the plaque. But
this newly repaired plaque can also be very unstable. It is more likely to
rupture again, putting you at even greater risk of a heart attack.
A new study has linked air pollution to irregular
heartbeat and lung blood clots. "Some 400,000 heart attacks recorded
in MINAP; more than [two] million emergency admissions for cardiovascular problems;
and 600,000 deaths from a heart attack [or] stroke were linked to average
levels of air pollutants over a period of 5 days using data from the monitoring
station nearest to the place of residence," the news release reported. Air
pollutants included carbon monoxide, nitrogen dioxide, particulate matter (PM10
and PM2.5), sulphur dioxide, and ozone. Air pollution is mainly responsible for
respiratory related health problems that include dry cough, hay
fever, allergies, bronchitis, wheezing, asthma, chest discomfort
reduced lung function. It can also lead to heart disease, lung
cancer, COPD, etc. and researches have linked it to developmental and
mental disorders as well. Only Nitrogen Dioxide was found to be linked to
a higher rate of hospital admissions for cardiovascular disease. About three
million people across the globe are believed to die from pollution-related
conditions every year. These are usually caused by heart attack or stroke.
Many people aren't sure what's wrong when they are having symptoms
of a heart attack. Some of the most common warning symptoms of a heart attack
for both men and women are:
- Chest pain or discomfort. Most heart attacks involve discomfort in the centre or left side of the chest. The discomfort usually lasts more than a few minutes or goes away and comes back. It can feel like pressure, squeezing, fullness, or pain. It also can feel like heartburn or indigestion.
- Upper body discomfort. You may feel pain or discomfort in one or both arms, the back, shoulders, neck, jaw, or upper part of the stomach (above the belly button).
- Shortness of breath. This may be your only symptom, or it may occur before or along with chest pain or discomfort. It can occur when you are resting or doing a little bit of physical activity.




