Normal results or severe brady/heart block?

[is_something_wrong]

I first noticed some skipped beats (premature contractions) some months ago, got scared, and requested some tests (Holter, echocardiography, stress ECG test), and of course some ECGs at rest. Results as follows:

Resting ECGs: All normal
Holter: My cardiologist said "everything normal, some PAC's, low number.
Echo: All normal.
Stress test: All normal, one PAC.

For some reason I was not completely relaxed (still feeling some dizziness, premature beats, tachy), but I believed this was caused by my anxiety, and went to see a doctor for hypocondriac therapy.

She went through the Holter data results with me, and the results was as follows:

15 PACs
50 PVCs (according to her and cardiologist analysis error, there were no PVCs)
Max HR 184 (due to some sprinting under test, just to check for symptoms)
Min HR 38 (a couple of times during sleep).
Avg HR 76.

I got a panic attack (at MDs office) due to the severe brady at night. I have read too much medicine (cardiology articles) and did NOT want to know the Holter details. When I now know them, I can't stop thinking about them.

From this, I have obtained a bad habit, checking my pulse all the time. It's often irregular, but rarely with PACs (I know how those feel now). My HR seems to vary at least 30% with breathing (I know this is normal), but also some times without breathing. I'm really afraid this is caused by a blocking somewhere in my heart.

Questions:
- If my Holter contained heart blockings, would that be visible, and told me by cardiologist / reported to my GP?
- My Holter is 3 months old. Is it possible that I have obtained heart blockings now, that was not registrated on Holter?
- Is my bradycardia at night severe? (I'm 28 y/o, normal shape, some exercise)

Other info: Male, some CAD at high age in family, normal cholesterol, BP varies from 110/65 to 130/85.

[is_something_wrong]

Thanks for answer.

I'm not sure if I understood this, though. You are saying "frequent PACs and significant HRV because of these". Is 15 PACs /24hrs significant (or 65, if the PVCs actually were PACs) ?

I ordered the Holter test. It was read by a cardiologist, and he told me that "everything was normal". It was read again by a curious GP. Even if she told me "everything is normal" the bradycardia scared me. After this post, I went to an internist for a second opinion. He told me "there is no heart blocks" and "the test is normal".

I have some beta blockers, but I'm afraid of using them when I have bradycardia at night. What is the difference between a beta blocker and antiarrhythmics, by the way? (maybe by antiarrhythmics you mean class III, ex. Sotalol and other QT-prolonging drugs)?

[Cleveland Clinic]

I am not sure who ordered or read the Holter, but I would ask your GP to have it read by a cardiologist to verify there is no significant heart block.
It sounds as if you have frequent PACs and have significant heart rate variation because of these. Based on your holter readings there do not seem to be that many PACs to pursue an ablation but maybe a beta blocker may be helpful. Antiarrhythmics can have grave side effects and I would not recommend them in your case.
Bradycardia is only dangerous if it occurs in the setting of significant conduction disease ( which you don't have based on your EKG) or if it is symptomatic, that is accompanied by passing out or severe dizziness. By definition you will not have any of these symptos during sleep, so it generally is not an issue.