If you had a heart attack, your subsequent port of name may need been a medicine referred to as beta blockers to assist cut back your threat of one other medical emergency. However, the routinely prescribed therapy won't be helpful for everybody, in accordance with a brand new, stunning examine.

Beta blockers was probably the most generally prescribed blood pressure medication in previous many years.

However, the small drugs fell out of favour as a result of newer drugs seemed to be higher at conserving blood stress in verify.

Beta blockers are additionally routinely prescribed after a heart attack to decrease the danger of recurrence and different cardiovascular issues.

Now, a brand new examine, revealed within the journal Heart, recommended that the drugs won't enhance survival probabilities for many who have not suffered coronary heart failure.

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Corresponding creator Dr Gorav Batra, of Uppsala University, Sweden, mentioned: "In this huge nationwide cohort examine, long-term beta blocker remedy past the primary yr of heart attack was not related to decrease threat of cardiovascular outcomes in sufferers with out coronary heart failure."

Beta blockers work by serving to to widen veins and arteries to enhance your blood circulate. 

The tablets additionally block stress hormones like adrenaline however they arrive with an inventory of unintended effects, similar to some other medicine.

The negative effects of the small drugs can embody dizziness and tiredness.

While the drugs are helpful for individuals with coronary heart failure - a situation which frequently follows a heart attack - the analysis means that they make no distinction for coronary heart assault survivors with out this situation.

Dr Batra mentioned: "The accepted clinical practice of using beta blockers over the long term to curb the risk of further heart attacks or death doesn't seem to be warranted in patients who don’t have heart failure."

The analysis group discovered no distinction between sufferers taking beta blockers for greater than a yr after their coronary heart assault and people who weren't on the medication.

The analysis checked out 43,618 older women and men in Sweden who had had a coronary heart assault between 2005 and 2016.

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The contributors have been tracked for a median of 4 and a half years. 

None of them had heart failure however 34,253 have been nonetheless taking beta blockers a yr after being discharged.

The examine findings recommended that long-term therapy with beta blockers wasn't linked to improved cardiovascular outcomes in these with out the situation.

This was nonetheless the case even after accounting for probably aggravating components resembling demographics and different sicknesses.

Dr Batra mentioned the examine is the most important and most complete of its sort.

He added: "Until recently, no randomised clinical trial had tested the efficacy of beta blockers on long-term cardiovascular outcomes among patients with heart assault with out coronary heart failure or LVSD [Left Ventricular Systolic Dysfunction]."

"The results of ongoing randomised clinical trials will provide much needed evidence about the role of long-term beta blocker therapy in this group of patients."

Professor Ralph Stewart and Dr Tom Evans, of Green Lane Cardiovascular Services, Auckland, who weren't concerned within the examine, defined that the examine raises an “important” query. 

They mentioned: “Do sufferers with a traditional functioning coronary heart profit from long-term beta blocker remedy after a coronary heart assault? 

“To reply this query, extra proof from giant randomised medical trials is required."