Dizziness Causes Essay

What about dizziness during pregnancy?

Dizziness is a common symptom during pregnancy. One of the reasons women feel dizziness during pregnancy is due to rising hormones that cause blood vessels to dilate, which increases blood flow to the baby, but also can result in lower blood pressure and temporary dizziness.

Other causes of dizziness during pregnancy include low blood sugar levels as the body's metabolism changes. Women who are anemic or who have varicose veins may experience dizziness more often.

Dizziness can occur in any trimester. It is most common in the first trimester, but during the second trimester, the expanding uterus puts pressure on blood vessels and can cause dizziness. In the third trimester, when you lie on your back the weight of the baby presses on your vena cava (a large vein that carries blood from your lower body to your heart) which can result in dizziness.

Contact your doctor if you experience dizziness during pregnancy, especially if the dizziness is constant or persistent, or if it is accompanied by pain in your abdomen or vaginal bleeding, blurred vision, headaches, or heart palpitations.

What are the causes of dizziness?

Dizziness may be attributed to a wide variety of causes. Sometimes doctors find no specific diagnosis for the affected individual, but some causes of dizziness are dangerous. Some causes of dizziness are listed.

Dizziness caused by heart diseases or blood pressure problems

  • Heart attack,
  • Arrhythmia (irregular heart rhythms), heart rate too fast or slow
  • Weakened, aged, or diseased heart muscle (cardiomyopathy), toxins or drugs that affect the rate or force of the contractions of the heart
  • Extremely high blood pressure
  • Low blood pressure, which can have multiple causes including diseases of the heart, bleeding disorders, anemia, and adverse reactions to medications

Posted By: Paul   |   Is Physician Assistant for Me?   |   26 Comments

Do you feel faint at the sight of blood?  If so, you’re not alone.  The most recent reader who was concerned about it wrote to me:

This is actually fairly common, and I wanted this reader to know.  Here’s my reply:

Dear Patrick,

In a word, no, you shouldn’t change your plans – at least not at this point. 

Because I’m not treating you*, I can’t say for sure, but it sounds like your feeling faint at the sight of blood is what is known as a vaso vagal reaction.  Lots of things can cause vasovagal reactions, such as

  • Seeing something distressing, like blood or surgery
  • Painful or unpleasant stimuli such as having medical procedures, or a trauma
  • Workout out too hard
  • Dehydration
  • Sleep deprivation

And many others. 

Basically, when you experience something stressful, sometimes our brain goes into “shock” mode, your higher brain (the cortex) signals the brainstem about the event.  For reasons that aren’t well understood, the brainstem sends a powerful parasympathetic message through the Vagus nerve (hence the name vasovagal) to the heart that causes it to slow.  Blood vessels also simultaneously lose their tone, which causes them to dilate.  As a result of these, your cardiac output and blood pressure drop suddenly.  This  makes it hard to get enough blood to the brain, and you become uncomfortable, hot, faint, dizzy, or pass out altogether.  Because parasympathetic stimulation causes peristalsis, your stomach churns and you may become nauseated.  Sometimes ringing in the ears (tinnitus) occurs as well.

In most cases, fainting at the sight of blood doesn’t mean you can’t go into medicine – it just means you need to adjust how you do it. With gradual exposure to the triggering stimulus, some people are able in time to get used to blood and guts and it isn’t a problem.  If you don’t get used to what triggers you, there are plenty of PA specialties that don’t require that kind of work – psychiatry, medical cardiology, endocrinology, dermatology, and many others.  Surgery is the biggest offender for this problem because you’re wrapped in a gown and other constricting clothing, looking at blood, and standing the whole time.  

Don’t feel bad; it sounds like you didn’t have a gentle introduction to surgery, which makes things worse.  There was a student in my class who passed out while watching her first pelvic exam on a patient. The exam room was packed with the patient, instructor, and student, and it was hot and stuffy, which didn’t help.

If you’ve had other conditions ruled out by your medical provider, you’ll probably be fine – just study up on it, and remember that some specialties may not be for you.

– Paul

If you have a problem with feeling faint at the sight of blood, there are also some precautions you can take:

The other reason that I bring this question up is that it’s a good example of how diverse the PA profession is, and the kinds of problems you can overcome while in it, if you think creatively.  If you can’t get past feeling faint at the sight of blood, psychiatry is a nice specialty to consider.  It pays well, and you rarely see anything gory.  Don’t like working one job for very long?  Consider locum tenens (traveling) work.  There are always options in such a big field.

*Just a reminder: this information is provided for educational and illustrative purposes.  If you get faint at the sight of blood, you should check with your doctor or PA to rule out more serious causes.[subscribe2]

 

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