Originally Posted by sadieandziggy
My dad gave up smoking after a heart attack in February this year. Heart Attacks are not Caused by smoking!!
This morning I felt further compelled to address this ridiculous idea...
I want to elaborate a little on what I posted yesterday...
Originally Posted by Pookie-poo
Smoking directly causes vasoconstriction. The definition of vasoconstriction is that blood vessels constrict, or become narrower, leading to reduced blood flow. If your vessels are already compromised by athrosclerosis (or diabetes)...then smoking CAN AND WILL cause a heart attack.
I'm so sorry Carol. You and your aunt are in my prayers.
One of the primary components of cigarette smoke is carbon monoxide (CO).http://www.csn.ul.ie/~stephen/reports/bc4927.html
The affinity between carbon monoxide and hemoglobin is 240 times stronger than the affinity between hemoglobin and oxygen. CO binds to hemoglobin, producing carboxyhemoglobin (COHb) - carbon monoxide toxicity arises from the formation of carboxyhemoglobin, which decreases the oxygen-carrying capacity of the blood. This inhibits the transport, delivery, and utilization of oxygen at the cellular level.
Carbon monoxide is life-threatening to humans and other forms of air-breathing life, as inhaling even relatively small amounts of it can lead to hypoxic injury, neurological damage, and possibly death. A concentration of as little as 0.04% (400 parts per million) carbon monoxide in the air can be fatal. There are 30,000 ppm carbon monoxide in undiluted cigarette smoke.http://en.wikipedia.org/wiki/Carbon_monoxide_poisoning
If a person has compromised vasculature due to athrosclerosis, peripherial vascular disease or diabetes, and smoking causes those vessles to constrict, which decreases the already compromised blood flow....how can blood (hemoglobin) that is tied up with the carbon monoxide possibly oxygenate the tissues? A heart attack is the death of cardiac muscle due to inadequate oxygenation....regardless of how that inadequate oxygenation occurs...by blockage, or by restricted bloodflow exacerbated by poor perfusion secondary to cigarette smoking.
If even one person is persuaded to give up smoking by my links and information, I will feel like I've done a good thing here....
Okay...enough of my hijack....I'll get off my soapbox now.