Şerife Gökçe ÇALIŞKAN, Mehmet Dinçer BİLGİN

Genç yetişkinlerde elektrofizyolojik ve hemodinamik parametreler üzerine kafeinli içeceklerin akut etkileri

Amaç: Kafeinli içeceklerin tüketimi son yıllarda gençler arasında önemli ölçüde artmıştır. Çalışmanın amacı, kafeinli içeceklerin genç erişkinlerin elektrokardiyografik ve hemodinamik parametreleri üzerindeki akut etkilerini araştırmaktır. Gereç ve Yöntem: Çalışma, randomize olmayan, plasebo kontrollü olmayan, üç kollu paralel bir atama olarak tasarlanmıştır. Aydın Adnan Menderes Üniversitesi'ne kayıtlı öğrenci havuzundan seçilen 56 kişi üzerinde gerçekleştirilmiştir. Başvuru kabul anketi sonuçlarına göre enerji içeceği, kahve, kola ve kontrol grupları belirlendi. Kan basıncı ve elektrokardiyogram, içecekleri tüketmeden önce ve 30 dakika ve 60 dakika sonra ölçüldü. Kalp hızı değişkenliği elektrokardiyogram sinyalinden tespit edildi ve lineer analiz ile araştırıldı. Bulgular: Tüm kafeinli içecekler kan basıncını yükseltti. Sadece enerji içeceği ve kola kalp atış hızını artırdı. Kahve grubunun ardışık R-R aralıkları arasındaki farkların karekökü ve 50 milisaniyeyi aşan NN intervallerinin sayısı (NN50) değerlerinde küçük bir artış oldu. Kahve ve kola grupları için yüksek frekans (HF) değerleri biraz arttı. Ancak düşük frekans (LF) ve LF/HF değerleri de azalmıştır. Bu değişiklikler kahve grubu için istatistiksel olarak anlamlıydı. PR intervali ve QRS kompleksi değişmedi, ancak enerji içeceği ve kola gruplarında QTc intervali QTc intervali daha düşüktü. Sonuç: Kafeinli içecek tüketimi, genç yetişkinlerin kardiyovasküler sistemi üzerinde olumsuz etkilere neden olma potansiyeline sahiptir. Kahve, enerji içeceği ve koladan daha etkin görünmektedir.

Acute effects of caffeinated beverages on electrocardiographic and hemodynamic parameters in young adults

Purpose: The consumption of caffeinated beverages has significantly increased among young people in recent years. The objective of the study is to investigate the acute effects of caffeinated beverages on electrocardiographic and hemodynamic parameters of young adults. Materials and Methods: Study was designed as a non-randomized, non-placebo controlled, three-arm parallel assignment. It was conducted on 56 individuals selected from a pool of students enrolled at Aydın Adnan Menderes University. Energy drink, coffee, cola and control groups were determined according to the results of the applicant acceptance questionnaire. Blood pressure and electrocardiogram were measured before and after consuming the drinks at 30 minutes and 60 minutes. Heart rate variability was detected from electrocardiogram signal and investigated by linear analysis. Results: All caffeinated drinks increased the blood pressure. Only, heart rate was increased by energy drink and cola. There was a small increment in root-mean square differences of successive R-R intervals and the number of times successive heartbeat intervals exceed 50ms (NN50) values in coffee group. High frequency (HF) values were increased some for coffee and cola groups. But, low frequency (LF) and LF/HF values were decreased. These alterations were statistically significant for coffee group. PR interval and QRS complex did not alter, however, QTc interval was lower in energy drink and cola groups. Conclusion: Caffeinated beverage consumption has the potential to induce adverse effects on cardiovascular system of young adults. Coffee appears to be more prominent than energy drink and cola.

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