Are ECG changes in heart-healthy individuals of various ages related to cardiac disease 20 years later?

  • Sofia Erelund Department of Surgery and Perioperative Sciences, Umeå University, Umeå, Sweden
  • Kjell Karp Department of Surgery and Perioperative Sciences, Umeå University, Umeå, Sweden
  • Urban Wiklund Department of Radiation Sciences, Umeå University, Umeå, Sweden
  • Sandra Arvidsson Department of Surgery and Perioperative Sciences, Umeå University, Umeå, Sweden
  • Rolf Hörnsten Department of Surgery and Perioperative Sciences, Umeå University, Umeå, Sweden
Keywords: Heart function test, electrocardiogram, normal values, clinical physiology, arrhythmia

Abstract

Background: This research study aimed at assessing the electrocardiographic (ECG) changes caused by ageing in a cohort of healthy subjects with normal echocardiographic examinations.

Methods: A total of 219 healthy individuals (119 males and 100 females) were evaluated for possible arrhythmias with a standard 12-lead resting ECG and 24-h Holter ECG. As the recordings were performed between 1998 and 2000, a 20-year follow-up study was carried out by assessing the local medical records to investigate whether the subjects had experienced any cardiovascular health complications or disease since the baseline assessment.

Results: Eighty-three subjects (45 males and 38 females) presented with pathological ECG findings at baseline. The most common finding on analysis of Holter ECG recordings was premature atrial contractions, and the most severe pathological finding was episodes of ventricular tachycardia (eight subjects). Regarding the analysis of the standard 12-lead ECG, the most common finding was left ventricular hypertrophy, and the most severe pathological findings were ST-T changes and prolongation of the QT interval. Despite other cardiac examinations performed on these patients showing normal results, in combination with a strict inclusion criterion, this study showed that 28% of all subjects had pathological resting 12-lead ECGs at rest and 35% had pathological heart rhythms when assessed by 24-h Holter ECG. At follow-up, 21% of females and 43% of males had presented with ECG abnormalities, and 30% of females and 36% of males had cardiovascular disease. There was hypertension in 45% of females and in 58% of males. However, no association was found between the follow-up findings and ECG changes seen at baseline.

Conclusion: Although most ECG changes found at baseline could be considered as a normal variation, they may progress to more severe heart complications as the subject ages. The results of this study also validate ECG findings of previous studies and underline that diagnostic criteria should be based on gender and age.

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Published
2021-05-21
How to Cite
Erelund, S., Karp, K., Wiklund, U., Arvidsson, S., & Hörnsten, R. (2021). Are ECG changes in heart-healthy individuals of various ages related to cardiac disease 20 years later?. Upsala Journal of Medical Sciences, 126(1). https://doi.org/10.48101/ujms.v126.6064
Section
Original Articles