My Husband Had A Quadruple By Pass In 2013 &

my husband had a quadruple by pass in 2013 & just had a abnormal ekg that says MARKED SINUS BRADYCARDIA & NONSPECIFIC T WAVE ABNORMALITY ...he smokes and drinks and will not follow up with his doctor ...what does this mean...he is 62 & has arterial disease they could not use his mammory arteries & had to use veins...