RLR
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Okay, I've read your posting and welcome to the forum.
I need to get some clarification from you. When you say you've experienced the palpitations for as long as you can remember, can you please be a bit more specific? The reason that I ask is that it's quite rare indeed for persons of pre-adolescence to take notice of something like a palpitation and rarely does it cause concern of any kind. In cases of both prominence and frequency, children are usually diagnosed with congenital defects or other conditions at that time which would explain the symptoms. For example, We see certain syndromes that can begin early in age such as Wolf-Parkinson-White but they have characteristic signs that are quite well-known and readily confirmed on diagnostic examination.
The typical onset for benign palpitations of the type being discussed on this forum ranges from about 13 years of age and beyond. I'll talk about this in a moment, but first let's go directly to your concerns. The resting phase of the heart, known as diastole, is the brief period of repolarization of cardiac tissues just prior to depolarization(discharge) of electrical activity in the atria followed by the ventricles, a period which averages about .05 seconds. Based upon your description, I'll mention here that mitral valve prolapse is characterized by a murmer that is quite recognizable and can rarely occur in the early diastolic phase. This could account for what your cardiologist is puzzled about regarding an abnormal diastole or resting phase.
The problem with this notion is that the echocardiogram or CT would certainly be able to detect a prolapse sufficient to cause such a murmer, yet it was ruled to be normal. While there are normal variants in people that show some extremely mild prolapse of the mitral valve, it must meet certain criteria to be diagnostic of clinical MVP.
So having said all of that, my impression is that you do not have MVP because of the contradiction in the various diagnostic data. There must be consensus and it's simply not there unless you have misinterpreted what the cardiologist has relayed to you.
I will tell you that it's quite noteworthy that you failed to experience any palpitations once at the hospital and under examination and although you may find this both puzzling and frustrating, it actually has clinical significance. A true heart condition would not disappear on examination. It's important, even critical, for you to understand how the body responds physiologically to stress. I also will caution you not to try and make comparisons between the overt sensations of situational stress and those associated with fear. Examples of this erroneous comparison can be seen within the context of some of the postings here, as well as by countless patients within the clinical setting.
In other words, stress can arise in many different forms and its effects can vary greatly between individuals. Incidentally, your disbelief that all heart conditions are the consequence of anxiety or stress has a basic fault; first of all, the palpitations being discussed on this forum are not the result of any type of heart condition. Simply because a symptom arises that affects the heart, does not indicate that the underlying origin must be in the heart itself. This is an entirely subjective conclusion. Many things can cause changes in the pace of the heart, its rhythm and its force.
Secondly, I do not believe that the sensation of being exhausted or out of breath has anything to do with the function of your heart. It's important to realize that tidal volume associated with respiration, or breathing in and out, is part of a normal physiological process wherein the phases of respiration produce changes in the heart's rate and rhythm. Any disruption, for instance a palpitation, can cause a corresponding change in sensation from what a patient feels to be normal for them. In other words, when you feel these strange beats or palpitations, the body does not actually need to gasp for air as a consequence as though the palpitation has caused you to suffer any type of oxygen deficit of any kind.
Many patients who experience palpitations describe a sensation in either the lungs, the throat, the abdomen or sometimes a combination of all these areas that causes them to either take a deep breath, swallow or change their body position in response. It's important to realize that the vagus nerve innervates all of the areas that I just described to you.
If you are presently experiencing any major changes in your life, either personal or within the workplace, then you need to be aware that these changes can can induce a particular kind of stress capable of producing physical symptoms, ie fatigue, GI complaints and certainly benign palpitations. The confusion for many patients often exists at the level of trying to compare situational stress or anxiety to their chronic counterparts.
To sum it up, my initial impression is that you're in the right place by visiting the forum. I doubt that the pending tests will produce anything remarkable and I don't believe anything to be structurally or electrically wrong with your heart. By the way, I do believe you're experiencing the symptoms you claim. The underlying reason may be where we have differences of opinion.
We'll talk more,
Best regards and Good Health
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