A method of detecting atrial fibrillation includes detecting a pulse signal to obtain a time pulse waveform and converting it to an energy spectrum waveform via Fast Fourier Transform. The energy spectrum waveform includes a first frequency region, a second frequency region, and a third frequency region. The number of spikes in each frequency region was calculated and the heart indexes of the first, second, and third frequency regions were obtained, which were the first heart index, the second heart index, and the third heart index. And by the sum of the three heart index values and the first heart index to determine the possibility of atrial fibrillation. An apparatus for detecting atrial fibrillation is also provided, whereby the user can determine the possibility and predicting atrial fibrillation by simple measurement of blood pressure at home.一種用於判斷心房顫動的方法,包含偵測一脈波訊號以獲得一時間脈波圖,並將其經由快速傅立葉轉換成一能量頻譜圖,能量頻譜圖包含第一頻率區域、第二頻率區域及第三頻率區域,經由計算每個頻率區域內雜訊的棘波個數,取得第一、第二及第三頻率區域的心臟指數,分別為第一心臟指數、第二心臟指數及第三心臟指數,並藉由三心臟指數的總和及第一心臟指數的數值來判斷是否可能為心房顫動。一種可判斷心房顫動的裝置亦被提供,藉此裝置,使用者可於居家透過簡易量測血壓方式判斷與預診斷心房顫動的發生可能性。S50、S52、S54、S56、S58‧‧‧步驟
