How to counter Heimerdinger
Let us take a look on how to beat Heimerdinger. We will look at champions who are strong against Heimerdinger and who are weak against Heimerdinger. Use win rate, gold difference and creep score difference at minute 10 to find the best 
Top champion who counters Heimerdinger. You can already win in champion select with the right counters for Heimerdinger. If you want to know how to counter Heimerdinger then you need to take into account the best picks vs Heimerdinger and the worst picks vs Heimerdinger. This Heimerdinger counter data is based on matches played by Pros on patch 14.21 and previous ones. It is important to see whether Pros counter picked Heimerdinger or whether they played as Heimerdinger.
Champions used by Pros to counter pick Heimerdinger
Looking at the matches from Pros (see table Pros counter picked Heimerdinger) we can see that they picked 
Gnar most often to counter pick Heimerdinger. The matchup Gnar vs Heimerdinger occured 6 times. Heimerdinger has 4 wins and 2 losses in this matchup. Learn how to counter pick Gnar to get another perspective on the data.
Lane outcome for Heimerdinger
When looking at Heimerdinger counters you will notice that win rates alone are not conclusional. Therefore we provide an overview (see table Lane Outcome) where you can see the lane outcome of Pros who played Heimerdinger. The lane outcome of Heimerdinger consists of three outcomes: Win, Loss or Draw. Let's take a look of Heimerdinger lane and match outcome for specific matchups. Considering the lane outcome and the match outcome of a specific matchup, might enable you to find the right counter for Heimerdinger.
Conclusion
Analyze the available data and learn how to beat Heimerdinger. To master Heimerdinger take also a look on Heimerdinger builds and runes for Heimerdinger. Good luck, Summoner!