Períodos irregulares do ciclo cardíaco. O que há de errado?

During exertion my heartbeat tends to go:

lub-dub (short pause) lub-dub (long pause) lub-dub....

It is definitely irregular, and I am positive I am timing/counting cycles, not systoles/diastoles. What could be wrong?

I am 15, very fit (if I may say so myself), I eat healthy, but the past two weeks I have been eating less, cutting for summer. More elaborately, for if it helps:

Breakfast: 55g of oatmeal with milk, fruits, medium portion of baked tomato beans. (440 kcal)

No lunch

Snack: 1 quesadilla, fruits/veggies, 1 or 2 plain rice crackers (260 kcal)

 

Dinner: Very large portion of rice with chili con carne, fruits/veggies. (750 kcal)

It adds up to about 1440 calories, but before you assume an eating disorder, note that I had little to no exertion that day. All I did was bike moderately to the gym (3.5 km) do a really underwhelming workout, and bike back.

So in short: 15 yrs, fit, male, 1440 kcal.  

Do you drink energy drinks?  Like Monster, Red Bull, Amp, 247, 5-Hour Energy, Mountain Dew, or anything in this category?  If drank in excess these drinks are known to cause heart palpitations, and worst of all, heart attacks and death. If you don't drink energy drinks I would suggest seeing a doctor or going an ER ASAP.   

Não acho que pular o almoço seja uma boa ideia e sua dieta parece ter pouca proteína para alguém da sua idade.

Acho que as batidas perdidas precisam ser verificadas para descartar fibrilação atrial, que pode afetar pessoas de todas as idades, então uma consulta com um médico (ou enfermeiro) seria apropriada - eles podem dar uma ideia aproximada apenas contando seu pulso por 1 minuto para detectar as batidas perdidas e, em seguida, recomendariam ação adicional, se necessário.

Cuide-se e talvez aumente a proteína (ovos, carne, peixe)!