The Australian healthcare industry certainly has been one of the best places to invest in the last five years.

During that time the S&P/ASX 200 Health Care (Index: ^AXHJ) (ASX: XHJ) has risen a staggering 151%, compared to a 21% gain by the S&P/ASX 200 (Index: ^AXJO) (ASX: XJO).

Whilst I highly doubt that this level of outperformance will continue over the next five years, I still believe there are some fast-growing healthcare shares which could provide investors with market-beating returns.

Two shares at the top of my list are as follows:

Monash IVF Group Ltd (ASX: MVF)

As its name implies Monash IVF specialises in IVF and infertility treatments with operations predominantly in Australia, but also internationally. In FY 2016 Monash IVF reported a 12.9% jump in total IVF patient treatments across the company. Australian treatments increased 12.4%, which was well ahead of the industry average of 8.2%. Pleasingly this led to the company increasing its market share to 24%. The strong increase in treatments drove bottom line growth by an impressive 34.6% to $28.8 million. Management has forecast an increase in demand next year, which I expect could help the company deliver another bumper profit result.

Nanosonics Ltd. (ASX: NAN)

Nanosonics is a leading infection prevention specialist deriving the majority of its sales from the lucrative US market. Just last week the company released another record quarterly sales result of $17.8 million. This meant sales increased 18% quarter on quarter or a whopping 174% on the prior corresponding period. The driver of this growth has been the company’s trophon EPR product. Clinical studies have shown that the toxic liquid disinfectants currently being used in high-level disinfectant ultrasound probes are ineffective, whereas trophon EPR is completely effective. As a result I believe sales will continue to grow at a strong rate for some time to come.

If you're looking for even more ideas then look no further than these high quality growth shares. Each could be just what your portfolio needs to boost it higher.

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Motley Fool contributor James Mickleboro has no position in any stocks mentioned. The Motley Fool Australia owns shares of Nanosonics Limited. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Bruce Jackson.